H01M 8/04537
Electric variables
H01M8/04537 (Electric variables) appears on 2,592 US grants and 3,697 published applications in this corpus.
Search patents in H01M- Granted patents
- 2,592
- Published applications
- 3,697
- Assignees
- 665
- Inventors
- 5,007
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 1 | 0 |
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 1 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 1 | 0 |
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 3 | 0 |
| 1988 | 4 | 0 |
| 1989 | 5 | 0 |
| 1990 | 1 | 0 |
| 1991 | 4 | 0 |
| 1992 | 4 | 0 |
| 1993 | 1 | 0 |
| 1994 | 2 | 0 |
| 1995 | 0 | 0 |
| 1996 | 2 | 0 |
| 1997 | 7 | 0 |
| 1998 | 8 | 0 |
| 1999 | 8 | 0 |
| 2000 | 7 | 0 |
| 2001 | 18 | 13 |
| 2002 | 20 | 63 |
| 2003 | 34 | 70 |
| 2004 | 46 | 123 |
| 2005 | 32 | 147 |
| 2006 | 53 | 181 |
| 2007 | 57 | 174 |
| 2008 | 58 | 156 |
| 2009 | 71 | 185 |
| 2010 | 107 | 230 |
| 2011 | 128 | 154 |
| 2012 | 138 | 149 |
| 2013 | 144 | 109 |
| 2014 | 135 | 148 |
| 2015 | 125 | 147 |
| 2016 | 132 | 144 |
| 2017 | 111 | 136 |
| 2018 | 122 | 147 |
| 2019 | 147 | 153 |
| 2020 | 136 | 137 |
| 2021 | 152 | 127 |
| 2022 | 135 | 165 |
| 2023 | 140 | 197 |
| 2024 | 86 | 157 |
| 2025 | 116 | 149 |
| 2026 | 87 | 136 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Fuel cell system and fuel cell vehicle6 Oct 2026US 12,752,643 B2Kabushiki Kaisha Toyota Jidoshokki
- Fuel cell vehicle and controlling method thereof6 Oct 2026US 12,752,668 B2Hyundai Motor Company
- Hybrid hydrogen fuel cell combustor power system6 Oct 2026US 12,755,989 B2Caterpillar Inc.
- Method for controlling a drying process of a fuel cell system6 Oct 2026US 12,755,992 B2Robert Bosch GmbH
- Humidifier leak diagnosis system and method for a fuel cell system6 Oct 2026US 12,755,993 B2Hyundai Motor Company
- Conditioning method and conditioning device8 Oct 2026US 2026/0312092 A1Robert Bosch GmbH
- Fuel cell system8 Oct 2026US 2026/0312094 A1Aisan Kogyo Kabushiki Kaisha
- Detection method for detecting a state of a fuel cell system8 Oct 2026US 2026/0312095 A1
- Fuel Cell System8 Oct 2026US 2026/0312096 A1Hyundai Motor Company
- Ai driven vfd control for securing membrane in flow batteries8 Oct 2026US 2026/0312097 A1ViZn Energy Systems, Inc.
Most cited
By later US patents
- Method and apparatus for monitoring fuel cell performance359US 5,170,124 AMinister of National Defence of Her Majesty's Canadian Government · 1992
- Power supply apparatus220US 6,882,131 B1Matsushita Electric Industrial Co., Ltd. · 2005
- Automatic voltage imbalance detector205US 4,424,491 AThe United States of America as represented by the United States Department of Energy · 1984
- Power supply system and electronic device196US 7,538,451 B2Sony Corporation · 2009
- Fuel cell system and control method182US 7,064,967 B2Hitachi Home & Life Solutions, Inc. · 2006