H01M 8/249
Comprising two or more groupings of fuel cells
Official title: comprising two or more groupings of fuel cells, e.g. modular assemblies
H01M8/249 (Comprising two or more groupings of fuel cells) appears on 792 US grants and 1,049 published applications in this corpus.
Search patents in H01M- Granted patents
- 792
- Published applications
- 1,049
- Assignees
- 372
- Inventors
- 2,171
- Latest grant
- 14 Jul 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1981 | 2 | 0 |
| 1982 | 2 | 0 |
| 1983 | 3 | 0 |
| 1984 | 2 | 0 |
| 1985 | 1 | 0 |
| 1986 | 2 | 0 |
| 1987 | 1 | 0 |
| 1988 | 4 | 0 |
| 1989 | 2 | 0 |
| 1990 | 1 | 0 |
| 1991 | 4 | 0 |
| 1992 | 7 | 0 |
| 1993 | 4 | 0 |
| 1994 | 7 | 0 |
| 1995 | 6 | 0 |
| 1996 | 14 | 0 |
| 1997 | 6 | 0 |
| 1998 | 12 | 0 |
| 1999 | 17 | 0 |
| 2000 | 8 | 0 |
| 2001 | 14 | 3 |
| 2002 | 19 | 25 |
| 2003 | 16 | 22 |
| 2004 | 11 | 55 |
| 2005 | 14 | 54 |
| 2006 | 25 | 47 |
| 2007 | 15 | 50 |
| 2008 | 27 | 53 |
| 2009 | 25 | 43 |
| 2010 | 31 | 44 |
| 2011 | 41 | 41 |
| 2012 | 33 | 27 |
| 2013 | 24 | 23 |
| 2014 | 29 | 28 |
| 2015 | 29 | 34 |
| 2016 | 26 | 31 |
| 2017 | 23 | 20 |
| 2018 | 14 | 37 |
| 2019 | 25 | 32 |
| 2020 | 38 | 41 |
| 2021 | 32 | 41 |
| 2022 | 42 | 59 |
| 2023 | 43 | 94 |
| 2024 | 31 | 49 |
| 2025 | 36 | 51 |
| 2026 | 24 | 45 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Oxygen electrode catalytic layer for reversible, alkaline or anion exchange membrane electrochemical devices14 Jul 2026US 12,683,176 B2Hydrolite Ltd
- Arrangement and method for determining hydrogen purity16 Jun 2026US 12,656,297 B2Siemens Energy Global GmbH & Co. KG
- System and method for cooling a fuel cell assembly2 Jun 2026US 12,646,726 B2Liebherr-Aerospace Toulouse SAS
- Fuel cell array and fuel cell inspection method2 Jun 2026US 12,646,734 B2Hitachi High-Tech Corporation
- Fuel cell power plant heat exchanger19 May 2026US 12,633,550 B2Honda Motor Co., Ltd.
- Fuel cell system and control method therefor8 Oct 2026US 2026/0312102 A1Nissan Motor Co., Ltd.
- Stacked electrochemical cell systems1 Oct 2026US 2026/0302306 A1Bloom Energy Corporation
- Soc stack comprising connection plate24 Sep 2026US 2026/0286545 A1Topsoe A/S
- Fuel cell group for generating electric energy10 Sep 2026US 2026/0269288 A1AVL List GmbH
- Manifold for a fuel cell10 Sep 2026US 2026/0269298 A1Safran Power Units
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
- Generating electricity from coal in situ328US 4,250,230 AIn Situ Technology, Inc. · 1981
- Automatic voltage imbalance detector205US 4,424,491 AThe United States of America as represented by the United States Department of Energy · 1984
- Purge gas protected transportable pressurized fuel cell modules and their operation in a power plant195US 5,573,867 AWestinghouse Electric Corp. · 1996
- Solid oxide fuel cell generator with removable modular fuel cell stack configurations188US 5,741,605 AWestinghouse Electric Corp. · 1998