H01M 8/04104
Regulation of differential pressures
Official title: {Regulation of differential pressures}
H01M8/04104 (Regulation of differential pressures) appears on 324 US grants and 458 published applications in this corpus.
Search patents in H01M- Granted patents
- 324
- Published applications
- 458
- Assignees
- 190
- Inventors
- 950
- Latest grant
- 29 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 4 | 0 |
| 1977 | 0 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 1 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 2 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 1 | 0 |
| 1991 | 2 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 1 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 1 | 0 |
| 2000 | 0 | 0 |
| 2001 | 1 | 1 |
| 2002 | 3 | 5 |
| 2003 | 7 | 17 |
| 2004 | 4 | 17 |
| 2005 | 8 | 18 |
| 2006 | 5 | 13 |
| 2007 | 10 | 28 |
| 2008 | 11 | 15 |
| 2009 | 6 | 20 |
| 2010 | 10 | 16 |
| 2011 | 11 | 14 |
| 2012 | 16 | 6 |
| 2013 | 11 | 12 |
| 2014 | 12 | 20 |
| 2015 | 5 | 35 |
| 2016 | 21 | 37 |
| 2017 | 25 | 10 |
| 2018 | 24 | 24 |
| 2019 | 16 | 27 |
| 2020 | 24 | 15 |
| 2021 | 20 | 19 |
| 2022 | 18 | 16 |
| 2023 | 17 | 21 |
| 2024 | 7 | 21 |
| 2025 | 10 | 15 |
| 2026 | 10 | 16 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- System for regulating pressure in liquid hydrogen fuel tank for a fuel cell electric vehicle29 Sep 2026US 12,749,696 B2Korea Aerospace Research Institute
- Hydrogen fuel cell exhaust system1 Sep 2026US 12,725,814 B2HyTech Power, LLC
- Method for protecting components of a fuel cell system21 Jul 2026US 12,689,048 B2Robert Bosch GmbH
- Bipolar plate with media regulation and fuel cell stack2 Jun 2026US 12,646,725 B2Audi AG
- Method for controlling fuel cell device21 Apr 2026US 12,609,336 B2Japan Aerospace Exploration Agency
- Operating method for preventing anode depletion when operating a fuel cell system17 Sep 2026US 2026/0279854 A1Robert Bosch GmbH
- Balance-of-plant for electro-synthetic or electro-energy liquid-gas cells or cell stacks10 Sep 2026US 2026/0269283 A1Hysata Pty Ltd
- Fuel cell system10 Sep 2026US 2026/0269284 A1Honda Motor Co., Ltd.
- Controlling buoyancy of underwater device using fuel cells and propellers30 Jul 2026US 2026/0217349 A1University of Houston System
- Fuel cell system and method for starting a fuel cell system30 Jul 2026US 2026/0221477 A1Robert Bosch GmbH
Most cited
By later US patents
- Fuel cell with proton conducting membrane97US 6,492,047 B1Ramot University Authority for Applied Research and Industrial Development Ltd. · 2002
- Method for operating a combination partial oxidation and steam reforming fuel processor73US 6,521,204 B1General Motors Corporation · 2003
- Fuel cell with proton conducting membrane with a pore size less than 30 nm56US 6,447,943 B1Ramot University Authority for Applied Research and Industrial Development Ltd. · 2002
- Basic polymer electrolyte fuel cell40US 6,986,962 B2Honda Giken Kogyo Kabushiki Kaisha · 2006
- Fuel cell power plant34US 5,340,663 AInternational Fuel Cells Corporation · 1994