H01M 8/04574
Current
Official title: {Current}
H01M8/04574 (Current) appears on 931 US grants and 1,310 published applications in this corpus.
Search patents in H01M- Granted patents
- 931
- Published applications
- 1,310
- Assignees
- 329
- Inventors
- 2,234
- 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 | 2 | 0 |
| 1989 | 5 | 0 |
| 1990 | 1 | 0 |
| 1991 | 4 | 0 |
| 1992 | 2 | 0 |
| 1993 | 0 | 0 |
| 1994 | 2 | 0 |
| 1995 | 0 | 0 |
| 1996 | 2 | 0 |
| 1997 | 5 | 0 |
| 1998 | 2 | 0 |
| 1999 | 3 | 0 |
| 2000 | 5 | 0 |
| 2001 | 9 | 5 |
| 2002 | 9 | 32 |
| 2003 | 20 | 28 |
| 2004 | 24 | 55 |
| 2005 | 16 | 62 |
| 2006 | 20 | 78 |
| 2007 | 22 | 83 |
| 2008 | 24 | 65 |
| 2009 | 27 | 86 |
| 2010 | 47 | 77 |
| 2011 | 55 | 63 |
| 2012 | 51 | 62 |
| 2013 | 49 | 40 |
| 2014 | 62 | 41 |
| 2015 | 39 | 50 |
| 2016 | 36 | 46 |
| 2017 | 32 | 47 |
| 2018 | 41 | 44 |
| 2019 | 52 | 47 |
| 2020 | 46 | 42 |
| 2021 | 42 | 35 |
| 2022 | 36 | 49 |
| 2023 | 42 | 62 |
| 2024 | 33 | 40 |
| 2025 | 33 | 26 |
| 2026 | 27 | 45 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
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
- Information processing device and vehicle18 Aug 2026US 12,709,195 B2Honda Motor Co., Ltd.
- Fuel cell stack diagnostics using crowdsourcing for connected fuel cell vehicle4 Aug 2026US 12,700,601 B2Ford Global Technologies, LLC
- Method for operating a fuel cell system, and control device7 Jul 2026US 12,676,327 B2Robert Bosch GmbH
- Fuel cell array and fuel cell inspection method2 Jun 2026US 12,646,734 B2Hitachi High-Tech Corporation
- Detection method for detecting a state of a fuel cell system8 Oct 2026US 2026/0312095 A1
- High-temperature fuel cell system and method of operating it1 Oct 2026US 2026/0302279 A1Cellcentric GmbH & Co. KG
- Solid polymer fuel battery activation method1 Oct 2026US 2026/0302286 A1Honda Motor Co., Ltd.
- Fuel cell activation device1 Oct 2026US 2026/0302287 A1Honda Motor Co., Ltd.
- Method for monitoring the state of a redox flow battery system1 Oct 2026US 2026/0302301 A1LIVA Power Management Systems 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
- 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