H01M 8/04589
Of fuel cell stacks
Official title: {of fuel cell stacks}
H01M8/04589 (Of fuel cell stacks) appears on 659 US grants and 932 published applications in this corpus.
Search patents in H01M- Granted patents
- 659
- Published applications
- 932
- Assignees
- 240
- Inventors
- 1,563
- Latest grant
- 29 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 1 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 2 | 0 |
| 1988 | 0 | 0 |
| 1989 | 5 | 0 |
| 1990 | 1 | 0 |
| 1991 | 4 | 0 |
| 1992 | 2 | 0 |
| 1993 | 0 | 0 |
| 1994 | 2 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 5 | 0 |
| 1998 | 1 | 0 |
| 1999 | 2 | 0 |
| 2000 | 3 | 0 |
| 2001 | 4 | 5 |
| 2002 | 5 | 23 |
| 2003 | 14 | 20 |
| 2004 | 17 | 43 |
| 2005 | 11 | 48 |
| 2006 | 13 | 58 |
| 2007 | 20 | 63 |
| 2008 | 19 | 58 |
| 2009 | 20 | 66 |
| 2010 | 40 | 60 |
| 2011 | 44 | 50 |
| 2012 | 40 | 48 |
| 2013 | 36 | 31 |
| 2014 | 50 | 25 |
| 2015 | 26 | 27 |
| 2016 | 25 | 35 |
| 2017 | 20 | 25 |
| 2018 | 25 | 26 |
| 2019 | 32 | 27 |
| 2020 | 27 | 27 |
| 2021 | 24 | 21 |
| 2022 | 23 | 33 |
| 2023 | 32 | 49 |
| 2024 | 24 | 25 |
| 2025 | 24 | 15 |
| 2026 | 15 | 24 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Method and system for dynamically modifying fuel cell stack current to manage fuel cell membrane hydration29 Sep 2026US 12,749,697 B2Ford Global Technologies, LLC
- Fuel cell stack diagnostics using crowdsourcing for connected fuel cell vehicle4 Aug 2026US 12,700,601 B2Ford Global Technologies, LLC
- Fuel cell performance optimization methodology combined with simulation and experiment19 May 2026US 12,633,554 B2Catarc New Energy Vehicle Test Center (Tianjin) Co., Ltd.
- Electrical system5 May 2026US 12,617,538 B2ROLLS-ROYCE plc
- Power supply control apparatus and electric discharge method5 May 2026US 12,620,823 B2Toyota Jidosha Kabushiki Kaisha
- High-temperature fuel cell system and method of operating it1 Oct 2026US 2026/0302279 A1Cellcentric GmbH & Co. KG
- Method for monitoring the state of a redox flow battery system1 Oct 2026US 2026/0302301 A1LIVA Power Management Systems GmbH
- Fuel Cell System And Method Of Returning From Idle Stop Operation To Normal Operation3 Sep 2026US 2026/0260917 A1Honda Motor Co., Ltd.
- Diagnostic method for a fuel cell system, and a fuel cell system27 Aug 2026US 2026/0253927 A1
- Method of diagnosing and preventing disconnection of fuel cell humidifier6 Aug 2026US 2026/0229562 A1Hyundai Motor Company
Most cited
By later US patents
- Power supply apparatus220US 6,882,131 B1Matsushita Electric Industrial Co., Ltd. · 2005
- Power supply system and electronic device196US 7,538,451 B2Sony Corporation · 2009
- Method for controlling a fuel cell141US 4,904,548 AFuji Electric Co., Ltd. · 1990
- Method and system for controlling output of fuel cell power generator135US 5,637,414 AFuji Electric Co., Ltd. · 1997
- Fuel cell generator and method of the same123US 5,677,073 AToyota Jidosha Kabushiki Kaisha · 1997