H01M 8/0494
Of fuel cell stacks
Official title: {of fuel cell stacks}
H01M8/0494 (Of fuel cell stacks) appears on 658 US grants and 972 published applications in this corpus.
Search patents in H01M- Granted patents
- 658
- Published applications
- 972
- Assignees
- 247
- Inventors
- 1,719
- Latest grant
- 4 Aug 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 | 1 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 1 | 0 |
| 1988 | 2 | 0 |
| 1989 | 1 | 0 |
| 1990 | 0 | 0 |
| 1991 | 1 | 0 |
| 1992 | 1 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 4 | 0 |
| 1998 | 1 | 0 |
| 1999 | 1 | 0 |
| 2000 | 1 | 0 |
| 2001 | 2 | 6 |
| 2002 | 3 | 9 |
| 2003 | 6 | 17 |
| 2004 | 10 | 38 |
| 2005 | 9 | 49 |
| 2006 | 14 | 46 |
| 2007 | 14 | 45 |
| 2008 | 14 | 52 |
| 2009 | 20 | 37 |
| 2010 | 38 | 41 |
| 2011 | 32 | 38 |
| 2012 | 37 | 30 |
| 2013 | 38 | 23 |
| 2014 | 32 | 25 |
| 2015 | 23 | 34 |
| 2016 | 13 | 28 |
| 2017 | 24 | 25 |
| 2018 | 26 | 35 |
| 2019 | 24 | 37 |
| 2020 | 34 | 34 |
| 2021 | 36 | 56 |
| 2022 | 32 | 65 |
| 2023 | 65 | 77 |
| 2024 | 33 | 38 |
| 2025 | 43 | 45 |
| 2026 | 20 | 42 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- 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
- Fuel cell power plant heat exchanger19 May 2026US 12,633,550 B2Honda Motor Co., Ltd.
- Condensate water drain control system and method for fuel cells19 May 2026US 12,633,552 B2Hyundai Motor Company
- Fuel Cell System8 Oct 2026US 2026/0312096 A1Hyundai Motor Company
- High-temperature fuel cell system and method of operating it1 Oct 2026US 2026/0302279 A1Cellcentric GmbH & Co. KG
- Control device for fuel cell system and control method therefor1 Oct 2026US 2026/0302943 A1Honda Motor Co., Ltd.
- Fuel cell system10 Sep 2026US 2026/0269282 A1Honda Motor Co., Ltd.
- Fuel cell group for generating electric energy10 Sep 2026US 2026/0269288 A1AVL List GmbH
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
- 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