H01M 8/04619
Of fuel cell stacks
Official title: {of fuel cell stacks}
H01M8/04619 (Of fuel cell stacks) appears on 521 US grants and 773 published applications in this corpus.
Search patents in H01M- Granted patents
- 521
- Published applications
- 773
- Assignees
- 219
- Inventors
- 1,445
- Latest grant
- 15 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 0 | 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 | 1 | 0 |
| 1988 | 2 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 4 | 0 |
| 1998 | 2 | 0 |
| 1999 | 1 | 0 |
| 2000 | 0 | 0 |
| 2001 | 6 | 3 |
| 2002 | 5 | 12 |
| 2003 | 5 | 13 |
| 2004 | 7 | 20 |
| 2005 | 7 | 41 |
| 2006 | 12 | 38 |
| 2007 | 9 | 38 |
| 2008 | 12 | 47 |
| 2009 | 13 | 39 |
| 2010 | 25 | 50 |
| 2011 | 28 | 26 |
| 2012 | 23 | 27 |
| 2013 | 33 | 29 |
| 2014 | 29 | 39 |
| 2015 | 27 | 35 |
| 2016 | 21 | 25 |
| 2017 | 23 | 17 |
| 2018 | 21 | 21 |
| 2019 | 29 | 33 |
| 2020 | 20 | 21 |
| 2021 | 28 | 31 |
| 2022 | 31 | 45 |
| 2023 | 35 | 50 |
| 2024 | 16 | 29 |
| 2025 | 22 | 23 |
| 2026 | 22 | 21 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Fuel cell system and method for stopping power generation in fuel cell system15 Sep 2026US 12,738,515 B2Honda Motor Co., Ltd.
- Method of controlling a cooling fan for a fuel cell stack8 Sep 2026US 12,731,802 B2Hyundai Motor Company
- Fuel cell stack diagnostics using crowdsourcing for connected fuel cell vehicle4 Aug 2026US 12,700,601 B2Ford Global Technologies, LLC
- Fuel cell electric vehicle and method of controlling same28 Jul 2026US 12,695,104 B2Hyundai Motor Company
- Method for determining aging of a fuel cell system9 Jun 2026US 12,651,759 B2Volvo Truck Corporation
- High-temperature fuel cell system and method of operating it1 Oct 2026US 2026/0302279 A1Cellcentric GmbH & Co. KG
- Fuel cell group for generating electric energy10 Sep 2026US 2026/0269288 A1AVL List GmbH
- Method for removing v2o5 deposits in a redox flow battery module20 Aug 2026US 2026/0245932 A1LIVA Power Management Systems GmbH
- Apparatus and method for controlling fuel cell vehicle6 Aug 2026US 2026/0225497 A1Hyundai Motor Company
- Adaptive control system for a vehicle9 Jul 2026US 2026/0196542 A1GM Global Technology Operations LLC
Most cited
By later US patents
- Power supply apparatus with fuel cell and method of controlling the same162US 7,883,808 B2Hitachi, Ltd. · 2011
- Fuel cell power generation system138US 5,658,681 AAisin Aw Co., Ltd. · 1997
- Method and system for controlling output of fuel cell power generator135US 5,637,414 AFuji Electric Co., Ltd. · 1997
- Fuel cell system controller115US 6,495,277 B1IdaTech, LLC · 2002
- Off-board station and an electricity exchanging system suitable for use with a mobile vehicle power system114US 6,380,637 B1Ztek Corporation · 2002