H01M 8/04746
Pressure
Official title: Pressure; Flow
H01M8/04746 (Pressure) appears on 2,895 US grants and 4,467 published applications in this corpus.
Search patents in H01M- Granted patents
- 2,895
- Published applications
- 4,467
- Assignees
- 721
- Inventors
- 5,538
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 1 | 0 |
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 2 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 1 | 0 |
| 1987 | 2 | 0 |
| 1988 | 0 | 0 |
| 1989 | 4 | 0 |
| 1990 | 1 | 0 |
| 1991 | 4 | 0 |
| 1992 | 4 | 0 |
| 1993 | 0 | 0 |
| 1994 | 5 | 0 |
| 1995 | 0 | 0 |
| 1996 | 1 | 0 |
| 1997 | 4 | 0 |
| 1998 | 4 | 0 |
| 1999 | 5 | 0 |
| 2000 | 4 | 0 |
| 2001 | 11 | 12 |
| 2002 | 16 | 68 |
| 2003 | 28 | 56 |
| 2004 | 39 | 110 |
| 2005 | 42 | 118 |
| 2006 | 42 | 144 |
| 2007 | 51 | 169 |
| 2008 | 51 | 185 |
| 2009 | 63 | 193 |
| 2010 | 84 | 216 |
| 2011 | 117 | 166 |
| 2012 | 145 | 149 |
| 2013 | 132 | 145 |
| 2014 | 154 | 178 |
| 2015 | 127 | 167 |
| 2016 | 151 | 192 |
| 2017 | 133 | 166 |
| 2018 | 151 | 168 |
| 2019 | 161 | 215 |
| 2020 | 171 | 181 |
| 2021 | 196 | 184 |
| 2022 | 184 | 225 |
| 2023 | 223 | 296 |
| 2024 | 115 | 276 |
| 2025 | 153 | 271 |
| 2026 | 110 | 217 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- 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
- Method and system for estimating flight time of a hydrogen fuel cell UAV29 Sep 2026US 12,746,825 B2Industrial Technology Research Institute
- System and method for controlling fuel cell29 Sep 2026US 12,749,692 B2Hyundai Motor Company
- Advanced power electronic circuit for fuel cell vehicles enabling independent cooling of various systems8 Oct 2026US 2026/0307542 A1Ford Global Technologies, LLC
- Purge air sealing valve8 Oct 2026US 2026/0309238 A1GM Global Technology Operations LLC
- Fuel cell system with improved humidifier8 Oct 2026US 2026/0312088 A1Plastic Omnium New Energies France
- Fuel cell system and purging method for inerting a fuel cell system8 Oct 2026US 2026/0312091 A1
- Conditioning method and conditioning device8 Oct 2026US 2026/0312092 A1Robert Bosch GmbH
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
- Hydrocarbon fueled solid polymer fuel cell electric power generation system168US 5,360,679 ABallard Power Systems Inc. · 1994
- PEM fuel cell monitoring system167US 5,763,113 AGeneral Motors Corporation · 1998
- Method for controlling a fuel cell141US 4,904,548 AFuji Electric Co., Ltd. · 1990