H01M 8/04952
Of fuel cell stacks
Official title: {of fuel cell stacks}
H01M8/04952 (Of fuel cell stacks) appears on 34 US grants and 42 published applications in this corpus.
Search patents in H01M- Granted patents
- 34
- Published applications
- 42
- Assignees
- 28
- Inventors
- 121
- Latest grant
- 16 Dec 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 2002 | 0 | 1 |
| 2003 | 1 | 0 |
| 2004 | 0 | 2 |
| 2005 | 1 | 0 |
| 2006 | 0 | 4 |
| 2007 | 1 | 0 |
| 2008 | 1 | 3 |
| 2009 | 1 | 0 |
| 2010 | 0 | 2 |
| 2011 | 1 | 2 |
| 2012 | 0 | 0 |
| 2013 | 1 | 2 |
| 2014 | 1 | 3 |
| 2015 | 1 | 1 |
| 2016 | 4 | 1 |
| 2017 | 1 | 2 |
| 2018 | 1 | 0 |
| 2019 | 3 | 0 |
| 2020 | 1 | 2 |
| 2021 | 0 | 5 |
| 2022 | 4 | 3 |
| 2023 | 6 | 5 |
| 2024 | 4 | 0 |
| 2025 | 1 | 3 |
| 2026 | 0 | 1 |
By publication year. 2026 runs to 8 Oct.
Recent patents
- Ionic conductivity measurement device and method for fuel cell16 Dec 2025US 12,500,257 B2Hyundai Motor Company
- System and method for indirectly monitoring an isolation resistance of one or more fuel cells10 Dec 2024US 12,166,250 B2Toyota Motor Engineering & Manufacturing North America, Inc.
- Aircraft fuel cell system without the use of a buffer battery26 Mar 2024US 11,942,668 B2ZeroAvia, Inc.
- Method for controlling fuel cell device5 Mar 2024US 11,923,579 B2Japan Aerospace Exploration Agency
- Method for measuring impedance of fuel cell stack in vehicle9 Jan 2024US 11,870,113 B2Hyundai Motor Company
- Ionic conductivity measurement device and method for fuel cell4 Jun 2026US 2026/0155415 A1Hyundai Motor Company
- Fuel cell module4 Dec 2025US 2025/0372681 A1Kabushiki Kaisha Toyota Jidoshokki
- Control system for controlling a fuel cell system16 Oct 2025US 2025/0323296 A1Powercell Sweden AB
- Startup control method of fuel cell system25 Sep 2025US 2025/0300202 A1Hyundai Motor Company
- Ionic conductivity measurement device and method for fuel cell10 Aug 2023US 2023/0253592 A1Hyundai Motor Company
Most cited
By later US patents
- Fuel cells incorporating nanotubes in fuel feed50US 6,589,682 B12003
- Method for resorting characteristics of polymer electrolyte fuel cell7US 6,881,510 B1Matsushita Electric Industrial Co., Ltd. · 2005
- Fuel cell staging for molten carbonate fuel cells6US 11,476,486 B2ExxonMobil Technology and Engineering Company · 2022
- Method for regeneration of performance in a fuel cell3US 7,432,002 B2E. I. Du Pont de Nemours and Company · 2008
- Fast MEA break-in and voltage recovery3US 9,099,703 B2GM Global Technology Operations LLC · 2015