H01M 8/0491
Of fuel cell stacks
Official title: {of fuel cell stacks}
H01M8/0491 (Of fuel cell stacks) appears on 428 US grants and 583 published applications in this corpus.
Search patents in H01M- Granted patents
- 428
- Published applications
- 583
- Assignees
- 178
- Inventors
- 1,056
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1983 | 1 | 0 |
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 2 | 0 |
| 1988 | 3 | 0 |
| 1989 | 1 | 0 |
| 1990 | 0 | 0 |
| 1991 | 1 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 2 | 0 |
| 1997 | 2 | 0 |
| 1998 | 1 | 0 |
| 1999 | 0 | 0 |
| 2000 | 1 | 0 |
| 2001 | 2 | 4 |
| 2002 | 3 | 18 |
| 2003 | 10 | 17 |
| 2004 | 14 | 28 |
| 2005 | 9 | 20 |
| 2006 | 18 | 35 |
| 2007 | 5 | 42 |
| 2008 | 10 | 27 |
| 2009 | 16 | 25 |
| 2010 | 18 | 34 |
| 2011 | 20 | 21 |
| 2012 | 23 | 17 |
| 2013 | 16 | 11 |
| 2014 | 20 | 26 |
| 2015 | 16 | 20 |
| 2016 | 25 | 23 |
| 2017 | 13 | 19 |
| 2018 | 15 | 15 |
| 2019 | 21 | 31 |
| 2020 | 24 | 17 |
| 2021 | 19 | 23 |
| 2022 | 21 | 26 |
| 2023 | 32 | 34 |
| 2024 | 15 | 19 |
| 2025 | 19 | 17 |
| 2026 | 9 | 14 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Method for controlling a drying process of a fuel cell system6 Oct 2026US 12,755,992 B2Robert Bosch GmbH
- 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
- High voltage-type redox flow battery comprising SOC balancing device21 Apr 2026US 12,609,339 B2H2, Inc.
- System and method for controlling hydrogen stack current and load7 Apr 2026US 12,597,616 B2Ohmium International, Inc.
- Apparatus for providing operation logic of fuel cell system24 Mar 2026US 12,586,799 B2Hyundai Motor Company
- Method for monitoring the state of a redox flow battery system1 Oct 2026US 2026/0302301 A1LIVA Power Management Systems GmbH
- System and method for controlling hydrogen stack current and load13 Aug 2026US 2026/0234820 A1Ohmium International, Inc.
- Method for determining a regeneration measure in a fuel cell stack16 Jul 2026US 2026/0204604 A1Robert Bosch GmbH
- Drive control system and method for fuel cell vehicle25 Jun 2026US 2026/0175695 A1Hyundai Motor Company
- Method and Apparatus for Controlling a Power Transmission Device and a Fuel Cell Power System11 Jun 2026US 2026/0163036 A1Robert Bosch GmbH
Most cited
By later US patents
- Power supply apparatus220US 6,882,131 B1Matsushita Electric Industrial Co., Ltd. · 2005
- Fuel cell system and control method182US 7,064,967 B2Hitachi Home & Life Solutions, Inc. · 2006
- Method and system for controlling output of fuel cell power generator135US 5,637,414 AFuji Electric Co., Ltd. · 1997
- Fuel cell and method for controlling same103US 6,096,449 AAvista Labs · 2000
- Fuel cell and power chip technology97US 6,312,846 B1Integrated Fuel Cell Technologies, Inc. · 2001