H01M 8/00
Fuel cells
Official title: Fuel cells; Manufacture thereof
H01M8/00 (Fuel cells) appears on 27,574 US grants and 38,256 published applications in this corpus.
Search patents in H01M- Granted patents
- 27,574
- Published applications
- 38,256
- Assignees
- 5,574
- Inventors
- 41,616
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 58 | 0 |
| 1977 | 50 | 0 |
| 1978 | 44 | 0 |
| 1979 | 38 | 0 |
| 1980 | 69 | 0 |
| 1981 | 64 | 0 |
| 1982 | 74 | 0 |
| 1983 | 68 | 0 |
| 1984 | 66 | 0 |
| 1985 | 79 | 0 |
| 1986 | 83 | 0 |
| 1987 | 103 | 0 |
| 1988 | 109 | 0 |
| 1989 | 112 | 0 |
| 1990 | 86 | 0 |
| 1991 | 86 | 0 |
| 1992 | 111 | 0 |
| 1993 | 129 | 0 |
| 1994 | 144 | 0 |
| 1995 | 136 | 0 |
| 1996 | 134 | 0 |
| 1997 | 136 | 0 |
| 1998 | 175 | 0 |
| 1999 | 227 | 0 |
| 2000 | 272 | 0 |
| 2001 | 346 | 210 |
| 2002 | 432 | 948 |
| 2003 | 582 | 1226 |
| 2004 | 676 | 1657 |
| 2005 | 616 | 1674 |
| 2006 | 717 | 1840 |
| 2007 | 674 | 1877 |
| 2008 | 702 | 1810 |
| 2009 | 847 | 2033 |
| 2010 | 1294 | 2055 |
| 2011 | 1246 | 1669 |
| 2012 | 1350 | 1421 |
| 2013 | 1194 | 1355 |
| 2014 | 1245 | 1448 |
| 2015 | 1179 | 1475 |
| 2016 | 1055 | 1410 |
| 2017 | 1165 | 1297 |
| 2018 | 1093 | 1390 |
| 2019 | 1244 | 1351 |
| 2020 | 1284 | 1320 |
| 2021 | 1078 | 1320 |
| 2022 | 1159 | 1468 |
| 2023 | 1137 | 1685 |
| 2024 | 903 | 1673 |
| 2025 | 981 | 1417 |
| 2026 | 722 | 1227 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- H01M 8/04Auxiliary arrangements13,193
- H01M 8/10Fuel cells with solid electrolytes13,185
- H01M 8/02Details8,228
- H01M 8/24Grouping of fuel cells6,433
- H01M 8/06Combination of fuel cells with means for production of reactants or for5,348
- H01M 8/18Regenerative fuel cells1,888
- H01M 8/14Fuel cells with fused electrolytes659
- H01M 8/08Fuel cells with aqueous electrolytes651
All 13 subgroupsShow fewer
Recent patents
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- Process for improving flash sintering of ceramics and improved ceramics8 Oct 2026US 2026/0308072 A1The Regents of the University of Colorado, a body corporate
Most cited
By later US patents
- Ionic semiconductor materials and applications thereof795US 5,055,171 AT and G Corporation · 1991
- Enzyme electrode739US 4,224,125 AMatsushita Electric Industrial Co., Ltd. · 1980
- Method for manufacturing porous structure and method for forming pattern645US 6,565,763 B1Kabushiki Kaisha Toshiba · 2003
- Process for producing zirconium oxide thin films621US 7,754,621 B2ASM International N.V. · 2010
- Electrochemical production of ozone and hydrogen peroxide465US 5,972,196 ALynntech, Inc. · 1999