H01M 8/04679
Of fuel cell stacks
Official title: {of fuel cell stacks}
H01M8/04679 (Of fuel cell stacks) appears on 334 US grants and 497 published applications in this corpus.
Search patents in H01M- Granted patents
- 334
- Published applications
- 497
- Assignees
- 156
- Inventors
- 982
- Latest grant
- 29 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1983 | 1 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 1 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 1 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 1 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 2 | 0 |
| 2000 | 0 | 0 |
| 2001 | 2 | 1 |
| 2002 | 2 | 10 |
| 2003 | 4 | 8 |
| 2004 | 9 | 11 |
| 2005 | 5 | 15 |
| 2006 | 5 | 17 |
| 2007 | 5 | 22 |
| 2008 | 9 | 20 |
| 2009 | 7 | 15 |
| 2010 | 10 | 26 |
| 2011 | 14 | 16 |
| 2012 | 10 | 16 |
| 2013 | 11 | 12 |
| 2014 | 13 | 21 |
| 2015 | 14 | 24 |
| 2016 | 20 | 19 |
| 2017 | 11 | 12 |
| 2018 | 17 | 20 |
| 2019 | 19 | 24 |
| 2020 | 19 | 27 |
| 2021 | 23 | 25 |
| 2022 | 30 | 36 |
| 2023 | 26 | 28 |
| 2024 | 17 | 28 |
| 2025 | 16 | 27 |
| 2026 | 10 | 17 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Hydrogen leak sensing device and method for fuel cell vehicle29 Sep 2026US 12,749,695 B2Hyundai Motor Company
- Method of controlling a cooling fan for a fuel cell stack8 Sep 2026US 12,731,802 B2Hyundai Motor Company
- Assessing health of a fuel stack using fuel cell voltage diagnostics1 Sep 2026US 12,725,816 B2Hydrogenics Corporation
- Impedance monitoring of a modular electrolysis system25 Aug 2026US 12,716,141 B2Ohmium International, Inc.
- Method for protecting components of a fuel cell system21 Jul 2026US 12,689,048 B2Robert Bosch GmbH
- Diagnostic method for a fuel cell system, and a fuel cell system27 Aug 2026US 2026/0253927 A1
- Fuel cell system20 Aug 2026US 2026/0245929 A1Aisin Corporation
- Fuel cell system6 Aug 2026US 2026/0229561 A1Toyota Jidosha Kabushiki Kaisha
- Method for a property-related arrangement of fuel cells within a fuel cell stack23 Jul 2026US 2026/0213234 A1
- Method for determining a regeneration measure in a fuel cell stack16 Jul 2026US 2026/0204604 A1Robert Bosch GmbH
Most cited
By later US patents
- Electronic load for the testing of electrochemical energy conversion devices85US 6,324,042 B1Lynntech, Inc. · 2001
- Fuel-cells generator system and method of generating electricity from fuel cells75US 5,925,476 AToyota Jidosha Kabushiki Kaisha · 1999
- Efficient load-following power generating system61US 6,555,989 B1Ballard Power Systems Inc. · 2003
- Fuel cell power generation system and method of controlling the same48US 5,462,815 AFuji Electric Co., Ltd. · 1995
- Hybrid drive system47US 6,793,027 B1Yamaha Hatsudoki Kabushiki Kaisha · 2004