H01M 8/04686
Of auxiliary devices
Official title: {of auxiliary devices, e.g. batteries, capacitors}
H01M8/04686 (Of auxiliary devices) appears on 221 US grants and 307 published applications in this corpus.
Search patents in H01M- Granted patents
- 221
- Published applications
- 307
- Assignees
- 86
- Inventors
- 562
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1988 | 1 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 1 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 4 |
| 2003 | 0 | 3 |
| 2004 | 5 | 2 |
| 2005 | 2 | 10 |
| 2006 | 3 | 21 |
| 2007 | 3 | 10 |
| 2008 | 6 | 14 |
| 2009 | 4 | 18 |
| 2010 | 7 | 16 |
| 2011 | 11 | 5 |
| 2012 | 13 | 11 |
| 2013 | 11 | 6 |
| 2014 | 13 | 13 |
| 2015 | 12 | 5 |
| 2016 | 3 | 16 |
| 2017 | 8 | 11 |
| 2018 | 9 | 23 |
| 2019 | 15 | 19 |
| 2020 | 19 | 13 |
| 2021 | 18 | 20 |
| 2022 | 14 | 14 |
| 2023 | 21 | 20 |
| 2024 | 7 | 10 |
| 2025 | 10 | 12 |
| 2026 | 5 | 11 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Humidifier leak diagnosis system and method for a fuel cell system6 Oct 2026US 12,755,993 B2Hyundai Motor Company
- Fuel cell system21 Apr 2026US 12,609,337 B2Honda Motor Co., Ltd.
- Apparatus and method for correcting offset of pressure sensor in fuel cell system14 Apr 2026US 12,603,307 B2Hyundai Motor Company
- Fuel cell system having an air compressor and a driving control method for a motor of the air compressor7 Apr 2026US 12,597,620 B2Hyundai Motor Company
- Method for diagnosing valve failure of fuel cell system6 Jan 2026US 12,519,118 B2Hyundai Motor Company
- Method for operating an air system, and control unit13 Aug 2026US 2026/0237699 A1Robert Bosch GmbH
- Method of diagnosing and preventing disconnection of fuel cell humidifier6 Aug 2026US 2026/0229562 A1Hyundai Motor Company
- Method for detecting a malfunction, tank system, computer program product and storage means23 Jul 2026US 2026/0213233 A1Robert Bosch GmbH
- Method for operating a fuel cell system, and a control device18 Jun 2026US 2026/0171441 A1Robert Bosch GmbH
- Hydrogen supply system11 Jun 2026US 2026/0160390 A1Toyota Jidosha Kabushiki Kaisha
Most cited
By later US patents
- Hybrid drive system47US 6,793,027 B1Yamaha Hatsudoki Kabushiki Kaisha · 2004
- Auxiliary fuel cell system43US 7,250,231 B2IdaTech, LLC · 2007
- Power supply system, fuel pack constituting the system, and device driven by power generator and power supply system26US 6,777,118 B2Casio Computer Co., Ltd. · 2004
- Power supply system, fuel pack constituting the system, and device driven by power generator and power supply system26US 6,916,565 B2Casio Computer Co., Ltd. · 2005
- Fuel cell generator control system24US 4,741,978 AFuji Electric Co., Ltd. · 1988