燃料電池 (JP Patent Analysis Report)
The Technical Field "燃料電池" had 333 patent application filings in the most recent period (2023-01-01 to 2023-04-30). This is a significantly decreased of -189 filings (-36.2%) over 522 they had in the same period of the previous year (2022-01-01 to 2022-04-30). This report also includes technical terms related to " 燃料セル " in the search set.
The highest number of filings in 2016 with 1,926 cases, and their lowest number in 2023 with 509 cases.
The mean of the number of filings over the last 5 years (2019 to 2024, 5,764 cases in total) is 961, and the median is 1,230. The coefficient of variation (standard deviation/mean) is 0.5, and there have been big fluctuations in the number of filings from year to year.
| Index | Value |
|---|---|
| Average | 961 patents |
| Std Dev | 502 |
| COV | 0.5 |
The number of filings has been decreasing for the last 3 years (2021 to 2024).
| Year | Cases | YOY |
|---|---|---|
| 2023 year | 509 cases | -58.9 % |
| 2022 year | 1,239 cases | +1.47 % |
| 2021 year | 1,221 cases | -5.20 % |
This report provides the latest patent analysis information (the IP landscape, including a patent map) on the patent search results of the JP patent database for 燃料電池 for the period of the last 10 years (2015-01-01 to 2024-12-31). You can compare the information in this report with the trends in your competitors’ patent filings and technologies, and use it to search for important patents.
This service provides, free of charge, a patent analysis report based on the latest patent data (Japanese, U.S., European, and PCT application publications) for use in patent searches, patent analysis, and IP landscaping. The service is offered by "Patent Integration" a firm specializing in patent search/patent analysis.
This report includes basic information to help you understand the IP strategy and management of 燃料電池, such as changes in the number of patents/patent applications they have filed, comparisons of the numbers of patents/patent applications filed by their peers and competitors, their top coapplicants (joint research partners, alliance partners), and their most important patents. It can be used in various intellectual property business operations such as IP landscaping, patent search/patent analysis, preparation of intellectual property business evaluation reports, selection of M&A candidates, and selection of alliance partners.
He is a patent attorney at a patent office. He specializes in invention counseling, patent filing, and intellectual property strategies for start-up companies and new businesses in the fields of software, information technology and artificial intelligence. He runs a patent course for beginners on Udemy, an online course provider.
After studying physics at the University of Tokyo as a doctoral student, he was engaged in intellectual property analysis and technology trend research as an in-house patent attorney at a precision equipment manufacturer and at Toyota Central R&D Labs. Inc..
Introduction
The concept of the "IP landscape" (IPL) has been attracting attention recently.
An IP landscape is not limited to patent information, but also integrates and analyzes business information (e.g., non-patent information such as papers, news releases, stock information, and market information). Intellectual-property-based business management is realized through the analysis of intellectual property information applied to the formulation of management strategies and business strategies. This is a comprehensive approach that includes but not limited to planning of open and closed strategies, selecting M&A candidates, searching for alliance partners, and formulating intellectual property strategies, through the exploitation of intellectual property information.
IP landscaping usually includes patent search and patent analysis. In patent search and patent analysis, it is important to grasp the market position of each company and the overall technological trends and development trends for each technology. More specifically, it is important to understand what intellectual property your own company and other companies hold, what the strengths and weaknesses of other companies are, and how other companies are trying to exploit their intellectual property. In other words, it is important to understand both the business strategy and the intellectual property strategy of each company.
After reading this search report, you may be interested in more detailed patent searches and patent analysis. We offer a service called Patent Integration, which is an integrated patent search and patent analysis service. With reasonable pricing and a simple user interface such that even beginners can quickly search for and analyze patent information by company or technology from a web browser, please consider using it for detailed patent searches, patent analysis, and IP landscaping.
Patent Integration has a patent-landscaping function that can visually represent a set of tens of thousands of patents/patent applications. This allows you to convincingly show the technical positions of your company and its competitors to your management and business strategists in order to formulate management strategies and business strategies.
燃料電池, Changes in the Number of JP Patents/Patent Applications
The changes in the number of patent filings of 燃料電池 over the last 20 years (JP) are shown below.
The change in the number of patents/patent applications is the most basic index in patent analysis. By examining the change in the number of patents/patent applications, you can see the status of technological development and R&D focus for each company or technology. It should be noted that since there is a one and a half year lag between the filing and the laying open of patent applications, it is not possible to analyze the situation more recently than one and half years prior to the present.
In this report, you can only see the change in the number of patents/patent applications by company or technology, whereas Patent Integration allows you to quickly compare the number of patent applications with your competitors in each technical field by cross-referencing with other keywords and patent classifications.
Search Set (Analysis Patents)
This patent analysis report was created for a patent search set of 12,994 cases retrieved by applying the following search formula and analysis period to the following patent database. Patent information such as a patent analysis result, a patent map, and a patent landscape can be freely used for patent searches, analysis, and work on intellectual property strategies, including IP landscaping.
燃料電池
Same industry / competition company information (JP)
The number of patents and changes in the number of patents of other companies (competitors) in the same industry as 燃料電池 are shown below.
Comparison of changes in the number of patents with peers and competitors is an important analytical index for understanding the intellectual property strategies of each company. By checking the transition of the number of patents for each company / competitor, you can check the status of focus on technology development and R&D for each company / technology.
It should be noted that patents have a time lag of one and a half years from filing to publication, so it is not possible to analyze the situation more recent than one and a half years.
If you want to find out more information, " Patent Integration , You can compare the number of patent applications with competitors in each technical field in a short time by multiplying with other keywords and patent classifications.Please use it for more detailed patent information analysis such as selection of M&A candidate destinations and alliance destinations.
Trends in filing of joint patent applications in the last 3 years (2023 to 2025).
Comparing the number of applications of each company, トヨタ自動車株式会社 has the highest number of joint applications in the last in the last 3 years (2023 to 2025) with 122 cases, followed by 本田技研工業株式会社 with 31 cases.
| Name | Cases |
|---|---|
| トヨタ自動車株式会社 | 122 cases |
| 本田技研工業株式会社 | 31 cases |
| 富士電機株式会社 | 21 cases |
| 株式会社アイシン | 14 cases |
| 京セラ株式会社 | 8 cases |
| 株式会社東芝 | 7 cases |
| 三菱重工業株式会社 | 5 cases |
| 日産自動車株式会社 | 3 cases |
| パナソニックホールディングス株式会社 | 2 cases |
| 株式会社日立製作所 | 1 cases |
Trends in filing of joint patent applications for the target period (2015 to 2025).
Comparing the number of applications of each company, トヨタ自動車株式会社 has the highest number of joint applications in the last for the target period (2015 to 2025) with 2,803 cases, followed by 本田技研工業株式会社 with 805 cases.
| Name | Cases |
|---|---|
| トヨタ自動車株式会社 | 2,803 cases |
| 本田技研工業株式会社 | 805 cases |
| 日産自動車株式会社 | 359 cases |
| 京セラ株式会社 | 311 cases |
| 株式会社アイシン | 285 cases |
| 株式会社東芝 | 175 cases |
| 富士電機株式会社 | 93 cases |
| 三菱重工業株式会社 | 58 cases |
| パナソニックホールディングス株式会社 | 44 cases |
| 株式会社日立製作所 | 19 cases |
| 三洋電機株式会社 | 1 cases |
Same industry / competition company, Change in the Number of JP Patents
Below is a patent map showing changes in the number of applications for JP patents of 11 companies in the same industry over the past 20 years.
Top company information (JP)
The number of patents and changes in the number of patents of other companies (competitors) in the same industry as 燃料電池 are shown below.
Comparison of changes in the number of patents with peers and competitors is an important analytical index for understanding the intellectual property strategies of each company. By checking the transition of the number of patents for each company / competitor, you can check the status of focus on technology development and R&D for each company / technology.
It should be noted that patents have a time lag of one and a half years from filing to publication, so it is not possible to analyze the situation more recent than one and a half years.
If you want to find out more information, " Patent Integration , You can compare the number of patent applications with competitors in each technical field in a short time by multiplying with other keywords and patent classifications.Please use it for more detailed patent information analysis such as selection of M&A candidate destinations and alliance destinations.
Trends in filing of joint patent applications in the last 3 years (2023 to 2025).
Among the top coapplicants, トヨタ自動車株式会社 has the highest number of joint applications in the last in the last 3 years (2023 to 2025) with 122 cases, followed by 本田技研工業株式会社 with 31 cases.
| Name | Cases |
|---|---|
| トヨタ自動車株式会社 | 122 cases |
| 本田技研工業株式会社 | 31 cases |
| 京セラ株式会社 | 8 cases |
| 株式会社東芝 | 7 cases |
| 日産自動車株式会社 | 3 cases |
| パナソニックホールディングス株式会社 | 2 cases |
| 株式会社日立製作所 | 1 cases |
Trends in filing of joint patent applications for the target period (2015 to 2025).
Among the top coapplicants, トヨタ自動車株式会社 has the highest number of joint applications in the last for the target period (2015 to 2025) with 2,803 cases, followed by 本田技研工業株式会社 with 805 cases.
| Name | Cases |
|---|---|
| トヨタ自動車株式会社 | 2,803 cases |
| 本田技研工業株式会社 | 805 cases |
| 日産自動車株式会社 | 359 cases |
| 京セラ株式会社 | 311 cases |
| 株式会社東芝 | 175 cases |
| パナソニックホールディングス株式会社 | 44 cases |
| 株式会社日立製作所 | 19 cases |
Top company, Change in the Number of JP Patents
Below is a ranking of the number of JP patent applications by 燃料電池’s top 7 coapplicants over the last 20 years.
Below is a patent map showing the changes in the numbers of JP patent filings by 燃料電池’s top 7 coapplicants over the last 20 years.
Top company Details (JP)
Trends in filing of joint patent applications with トヨタ自動車株式会社
燃料電池 filed 2,803 joint applications with トヨタ自動車株式会社 for the analysis period (2015 to 2025).
The mean of the number of filings over the last 5 years (2019 to 2024, 1,363 cases in total) is 227, and the median is 266. The coefficient of variation (standard deviation/mean) is 0.6, and there have been big fluctuations in the number of filings from year to year.
The highest number of filings in 2018 with 467 cases, and their lowest number in 2023 with 120 cases.
| Index | Value |
|---|---|
| Average | 227 patents |
| Std Dev | 128 |
| COV | 0.6 |
| Year | Cases | YOY |
|---|---|---|
| 2023 year | 120 cases | -54.9 % |
| 2022 year | 266 cases | -0.37 % |
| 2021 year | 267 cases | -27.25 % |
Trends in filing of joint patent applications with 本田技研工業株式会社
燃料電池 filed 805 joint applications with 本田技研工業株式会社 for the analysis period (2015 to 2025).
The mean of the number of filings over the last 5 years (2019 to 2024, 413 cases in total) is 68.8, and the median is 88.5. The coefficient of variation (standard deviation/mean) is 0.6, and there have been big fluctuations in the number of filings from year to year.
The highest number of filings in 2016 with 133 cases, and their lowest number in 2023 with 26 cases.
| Index | Value |
|---|---|
| Average | 68.8 patents |
| Std Dev | 38.7 |
| COV | 0.6 |
| Year | Cases | YOY |
|---|---|---|
| 2023 year | 26 cases | -72.0 % |
| 2022 year | 93 cases | -10.58 % |
| 2021 year | 104 cases | +23.81 % |
Trends in filing of joint patent applications with 日産自動車株式会社
燃料電池 filed 359 joint applications with 日産自動車株式会社 for the analysis period (2015 to 2025).
The mean of the number of filings over the last 5 years (2019 to 2024, 80 cases in total) is 13.3, and the median is 14.0. The coefficient of variation (standard deviation/mean) is 0.7, and there have been relatively large fluctuations in the number of filings from year to year.
The highest number of filings in 2015 with 108 cases, and their lowest number in 2023 with 3 cases.
| Index | Value |
|---|---|
| Average | 13.3 patents |
| Std Dev | 9.8 |
| COV | 0.7 |
| Year | Cases | YOY |
|---|---|---|
| 2023 year | 3 cases | -72.7 % |
| 2022 year | 11 cases | -35.3 % |
| 2021 year | 17 cases | -19.05 % |
Trends in filing of joint patent applications with 株式会社東芝
燃料電池 filed 175 joint applications with 株式会社東芝 for the analysis period (2015 to 2025).
The mean of the number of filings over the last 5 years (2019 to 2024, 89 cases in total) is 14.8, and the median is 11.0. The coefficient of variation (standard deviation/mean) is 0.8, and there have been relatively large fluctuations in the number of filings from year to year.
The number of filings has been decreasing for the last 3 years (2021 to 2024). The highest number of filings in 2020 with 37 cases, and their lowest number in 2022 with 6 cases.
| Index | Value |
|---|---|
| Average | 14.8 patents |
| Std Dev | 12.5 |
| COV | 0.8 |
| Year | Cases | YOY |
|---|---|---|
| 2023 year | 7 cases | +16.67 % |
| 2022 year | 6 cases | -60.0 % |
| 2021 year | 15 cases | -59.5 % |
Trends in filing of joint patent applications with パナソニックホールディングス株式会社
燃料電池 filed 44 joint applications with パナソニックホールディングス株式会社 for the analysis period (2015 to 2025).
The mean of the number of filings over the last 5 years (2019 to 2024, 9 cases in total) is 1.5, and the median is 1.0. The coefficient of variation (standard deviation/mean) is 0.5, and there have been big fluctuations in the number of filings from year to year.
The highest number of filings in 2015 with 18 cases, and their lowest number in 2023 with 1 cases.
| Index | Value |
|---|---|
| Average | 1.5 patents |
| Std Dev | 0.8 |
| COV | 0.5 |
| Year | Cases | YOY |
|---|---|---|
| 2023 year | 1 cases | 0 |
| 2022 year | 1 cases | -50.0 % |
| 2021 year | 2 cases | -33.3 % |
Information on important patents (JP)
The following shows JP patents held by 燃料電池 that have had an invalidation trial against them demanded or an opposition filed against them by a third party, and 燃料電池’s JP patents/patent applications of high importance cited by Examiners in patent examination processes.
By noting the most important patents, you can obtain knowledge of the competitive business environment in which 燃料電池 is placed (e.g., whether it is a fiercely competitive environment or an oligopolistic market and the like). In general, it can be understood that a company with a large number of demands for invalidation trials is developing their business in a business environment where IP disputes are common.
If you want to search for more detailed information, you can use Patent Integration to retrieve and download by company cited patents/patent applications or patents undergoing invalidation trials. You can quickly extract important patents from a patent set that includes multiple competitors by cross-referencing with other keywords and patent classifications. Please consider using it for searches for important patents/patent applications.
Glossary
- Cited
- Indicates that the patent/patent application has been cited (by Examiners) in notices of reasons for rejection in the examination process of other (Japanese, U.S., or European) patent applications. The higher the number of citations, the more important the patent/patent application is considered to be.
- Request for invalidation trial
- Indicates that a third party has requested a procedure to invalidate the patent. It is likely to affect the business of third parties and is considered to be of high importance.
- Opposition
- Indicates that a third party has filed a petition with the Patent Office to hear the validity of the patent again. Like the trial for invalidation, it is considered to be of high importance.
- Information provision
- Indicates that a third party has provided the Patent Office with useful information for examination for the patent filed. It is usually considered to be of high importance because it is done to prevent the patent from being granted.
- Browsing request
- Indicates that a third party has requested the Patent Office to view the patent bag (a set of documents exchanged between the Patent Office and the applicant). The bag is often checked prior to trial for invalidation, opposition, and provision of information, and is considered to be a highly important patent.
Oppositioned cases
List of latest Oppositioned patents
In the last 3 years (2022-01-01 ~ 2024-12-31), there were 27 patents Opposition from third parties. The average number of Opposition is 1.0 times. The most recently Opposition patent is 特許7478310 "改善された電気化学膜" (Opposition day 2024-11-01) , next is 特許7470038 "電気化学素子の金属支持体、電気化学素子、電気化学モジュール、電気化学装置、エネルギーシステム、固体酸化物形燃料電池、固体酸化物形電解セルおよび金属支持体の製造方法" (Opposition day 2024-10-16) .
| - | No. | Title | Opposition days |
|---|---|---|---|
| 1 | 特許7478310 | 改善された電気化学膜 | 2024-11-01 |
| 2 | 特許7470038 | 電気化学素子の金属支持体、電気化学素子、電気化学モジュール、電気化学装置、エネルギーシステム、固体酸化物形燃料電池、固体酸化物形電解セルおよび金属支持体の製造方法 | 2024-10-16 |
| 3 | 特許7446372 | 電解槽と結合された水素化物タンクを含む水の高温可逆電解用システム | 2024-09-04 |
| 4 | 特許7415839 | 燃料電池用セパレータ及びその製造方法 | 2024-07-16 |
| 5 | 特許7404196 | 故障診断装置、故障診断システム、及び故障診断プログラム | 2024-06-25 |
| 6 | 特許7404197 | 故障診断装置、故障診断システム、及び故障診断プログラム | 2024-06-25 |
| 7 | 特許7392241 | 燃料電池車用着色冷却液組成物 | 2024-05-24 |
| 8 | 特許7374530 | 多孔質セラミックス焼結体およびそれを用いた用途 | 2024-04-01 |
| 9 | 特許7338618 | 燃料電池のセパレータのオーステナイト系ステンレス鋼板およびその製造方法 | 2024-02-26 |
| 10 | 特許7329892 | 水素活用システム | 2024-02-16 |
Protested cases
List of latest Protested patents
In the last 3 years (2022-01-01 ~ 2024-12-31), there were 69 patents Protest from third parties. The average number of Protest is 1.2 times. The most recently Protest patent is 特開2024-133313 "改質ユニット、燃料電池モジュール及び燃料電池装置" (Protest day 2024-12-17) , next is 特開2023-047625 "燃料電池用セパレータ" (Protest day 2024-11-29) .
| - | No. | Title | Protest days |
|---|---|---|---|
| 1 | 特開2024-133313 | 改質ユニット、燃料電池モジュール及び燃料電池装置 | 2024-12-17 |
| 2 | 特開2023-047625 | 燃料電池用セパレータ | 2024-11-29 |
| 3 | 特表2024-529531 | モノポーラプレートの接着結合による黒鉛バイポーラプレートの製造方法、並びにモノポーラプレートを備えるバイポーラプレート及び燃料電池セル又はレドックスフロー電池 | 2024-11-26 |
| 4 | 特開2023-007050 | 燃料電池システムおよび燃料電池システムの制御方法 | 2024-11-21 |
| 5 | 特許7606717 | 熱硬化型接着シートおよび燃料電池用サブガスケット | 2024-11-07 |
| 6 | 特許7572341 | 燃料電池システム、及び燃料電池システムの制御方法 | 2024-10-10 |
| 7 | 特開2023-085096 | 燃料電池システム | 2024-10-10 |
| 8 | 特開2024-028790 | 水素生成システム、及び水素燃料利用システム | 2024-10-10 |
| 9 | 特開2024-016157 | 燃料電池システム及び設備管理方法 | 2024-10-10 |
| 10 | 特開2023-057256 | 燃料電池 | 2024-09-26 |
| 11 | 特開2022-165246 | 燃料電池車両 | 2024-09-17 |
| 12 | 特表2023-552978 | 表面親水性及び電気伝導性に優れた燃料電池分離板用ステンレス鋼及びその製造方法 | 2024-09-13 |
| 13 | 特開2023-113490 | 燃料電池システム | 2024-08-19 |
| 14 | 特開2023-000349 | 貨物運搬船 | 2024-08-13 |
| 15 | 特表2024-518655 | ピストン圧縮機 | 2024-08-09 |
| 16 | 特表2022-522970 | 化学物質の生成における断続的エネルギーの使用 | 2024-08-09 |
| 17 | 特許7604861 | 炭素材料およびそれを用いてなる導電性組成物、導電膜 | 2024-07-17 |
| 18 | 特開2022-152524 | 燃料電池用シール部材 | 2024-07-11 |
| 19 | 特許7554175 | アノード極用ガス拡散層基材 | 2024-07-10 |
| 20 | 特開2023-054468 | 燃料電池電源装置 | 2024-06-18 |
Top Patents/Patent Applications with the Highest Number of Protested
Of the patent applications filed in the last 10 years (2015-01-01 to 2024-12-31), 128 patents/patent applications were protest more than once in the examination process of other patent applications. The mean of the number of protest is 1.2. The most protest patent is 特許7606717 "熱硬化型接着シートおよび燃料電池用サブガスケット" (6 times) , and the next most protest patent is 特許7411328 "双極性アイオノマー膜" (4 times) .
| - | No. | Title | |
|---|---|---|---|
| 1 | 特許7606717 | 熱硬化型接着シートおよび燃料電池用サブガスケット | 6 times |
| 2 | 特許7411328 | 双極性アイオノマー膜 | 4 times |
| 3 | 特許6008000 | 前駆体シート | 3 times |
| 4 | 特許7256359 | 固体高分子形燃料電池用膜電極接合体及び固体高分子形燃料電池 | 3 times |
| 5 | 特許6481766 | 多孔質基材、多孔質電極、炭素繊維紙、炭素繊維紙の製造方法、多孔質基材の製造方法 | 2 times |
Inspectioned cases
List of latest Inspectioned patents
In the last 3 years (2022-01-01 ~ 2024-12-31), there were 75 patents Inspection from third parties. The average number of Inspection is 1.4 times. The most recently Inspection patent is 特許7604861 "炭素材料およびそれを用いてなる導電性組成物、導電膜" (Inspection day 2024-12-24) , next is 特開2023-007050 "燃料電池システムおよび燃料電池システムの制御方法" (Inspection day 2024-12-23) .
| - | No. | Title | Inspection days |
|---|---|---|---|
| 1 | 特許7604861 | 炭素材料およびそれを用いてなる導電性組成物、導電膜 | 2024-12-24 |
| 2 | 特開2023-007050 | 燃料電池システムおよび燃料電池システムの制御方法 | 2024-12-23 |
| 3 | 特開2023-047625 | 燃料電池用セパレータ | 2024-12-18 |
| 4 | 特表2024-529531 | モノポーラプレートの接着結合による黒鉛バイポーラプレートの製造方法、並びにモノポーラプレートを備えるバイポーラプレート及び燃料電池セル又はレドックスフロー電池 | 2024-12-05 |
| 5 | 特開2015-057022 | 分散電源装置、電力切替装置及び電力供給システム | 2024-12-04 |
| 6 | 特表2022-524085 | 熱伝達流体及びその使用のための腐食抑制剤配合物 | 2024-11-26 |
| 7 | 特許7606717 | 熱硬化型接着シートおよび燃料電池用サブガスケット | 2024-11-12 |
| 8 | 特許7572341 | 燃料電池システム、及び燃料電池システムの制御方法 | 2024-11-08 |
| 9 | 特開2023-085096 | 燃料電池システム | 2024-11-08 |
| 10 | 特開2024-016157 | 燃料電池システム及び設備管理方法 | 2024-11-06 |
| 11 | 特開2022-165246 | 燃料電池車両 | 2024-10-09 |
| 12 | 特開2023-057256 | 燃料電池 | 2024-10-01 |
| 13 | 特表2024-518655 | ピストン圧縮機 | 2024-09-12 |
| 14 | 特開2023-113490 | 燃料電池システム | 2024-09-10 |
| 15 | 特開2023-000349 | 貨物運搬船 | 2024-09-10 |
| 16 | 特表2022-522970 | 化学物質の生成における断続的エネルギーの使用 | 2024-09-04 |
| 17 | 特開2023-054468 | 燃料電池電源装置 | 2024-07-15 |
| 18 | 特表2022-513513 | 熱伝達方法、システム、及び流体 | 2024-07-05 |
| 19 | 特許7566813 | 高選択性及び高強度のための高度に強化されたイオノマー膜 | 2024-06-26 |
| 20 | 特許7394923 | 炭素繊維シ－ト、ガス拡散電極、膜－電極接合体、固体高分子形燃料電池、及び炭素繊維シートの製造方法 | 2024-06-25 |
Top Patents/Patent Applications with the Highest Number of Inspectioned
Of the patent applications filed in the last 10 years (2015-01-01 to 2024-12-31), 166 patents/patent applications were inspection more than once in the examination process of other patent applications. The mean of the number of inspection is 1.3. The most inspection patent is 特許7606717 "熱硬化型接着シートおよび燃料電池用サブガスケット" (19 times) , and the next most inspection patent is 特許6481766 "多孔質基材、多孔質電極、炭素繊維紙、炭素繊維紙の製造方法、多孔質基材の製造方法" (4 times) .
| - | No. | Title | |
|---|---|---|---|
| 1 | 特許7606717 | 熱硬化型接着シートおよび燃料電池用サブガスケット | 19 times |
| 2 | 特許6481766 | 多孔質基材、多孔質電極、炭素繊維紙、炭素繊維紙の製造方法、多孔質基材の製造方法 | 4 times |
| 3 | 特許6008000 | 前駆体シート | 4 times |
| 4 | 特許6575281 | 固体高分子型燃料電池用多孔質炭素繊維シートの巻き取り方法 | 3 times |
| 5 | 特表2022-524807 | 燃料電池用ガス拡散層および燃料電池 | 3 times |
Cited cases
Top Patents/Patent Applications with the Highest Number of Cited
Of the patent applications filed in the last 10 years (2015-01-01 to 2024-12-31), 3,703 patents/patent applications were cited more than once in the examination process of other patent applications. The mean of the number of cited is 2.4. The most cited patent is 特許6608753 "ＰｄＲｕ合金電極材料およびその製造方法" (336 times) , and the next most cited patent is 特許6260797 "燃料電池車両" (27 times) .
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