H01M 8/04634
Other electric variables
Official title: {Other electric variables, e.g. resistance or impedance}
H01M8/04634 (Other electric variables) appears on 389 US grants and 516 published applications in this corpus.
Search patents in H01M- Granted patents
- 389
- Published applications
- 516
- Assignees
- 149
- Inventors
- 1,009
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1989 | 2 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 1 | 0 |
| 1999 | 1 | 0 |
| 2000 | 1 | 0 |
| 2001 | 0 | 1 |
| 2002 | 1 | 5 |
| 2003 | 3 | 5 |
| 2004 | 3 | 9 |
| 2005 | 1 | 11 |
| 2006 | 6 | 14 |
| 2007 | 7 | 11 |
| 2008 | 5 | 23 |
| 2009 | 7 | 31 |
| 2010 | 12 | 44 |
| 2011 | 14 | 16 |
| 2012 | 20 | 16 |
| 2013 | 32 | 19 |
| 2014 | 16 | 21 |
| 2015 | 22 | 23 |
| 2016 | 25 | 31 |
| 2017 | 19 | 45 |
| 2018 | 26 | 22 |
| 2019 | 37 | 31 |
| 2020 | 23 | 20 |
| 2021 | 30 | 20 |
| 2022 | 18 | 25 |
| 2023 | 15 | 14 |
| 2024 | 15 | 16 |
| 2025 | 19 | 22 |
| 2026 | 8 | 21 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Method for controlling a drying process of a fuel cell system6 Oct 2026US 12,755,992 B2Robert Bosch GmbH
- Impedance monitoring of a modular electrolysis system25 Aug 2026US 12,716,141 B2Ohmium International, Inc.
- Electrochemical cell degradation monitoring method and system12 May 2026US 12,626,941 B2Robert Bosch GmbH
- Fuel cell system14 Apr 2026US 12,603,310 B2Toyota Jidosha Kabushiki Kaisha
- Closed loop control for fuel cell water management7 Apr 2026US 12,597,621 B2Hyster-Yale Group, Inc.
- Ai driven vfd control for securing membrane in flow batteries8 Oct 2026US 2026/0312097 A1ViZn Energy Systems, Inc.
- Fuel cell system1 Oct 2026US 2026/0302277 A1Honda Motor Co., Ltd.
- Control method for fuel cell system and control device for fuel cell system1 Oct 2026US 2026/0302290 A1Nissan Motor Co., Ltd.
- Fuel cell system and control method thereof17 Sep 2026US 2026/0279858 A1Honda Motor Co., Ltd.
- Voltage detection system23 Jul 2026US 2026/0211009 A1Toyota Jidosha Kabushiki Kaisha
Most cited
By later US patents
- Generator system utilizing a fuel cell62US 4,839,574 AFuji Electric Co., Ltd. · 1989
- Vehicle having a fuel cell or battery energy supply network53US 5,760,488 ADaimler-Benz Aktiengesellschaft · 1998
- Fuel cells incorporating nanotubes in fuel feed50US 6,589,682 B12003
- Hybrid drive system47US 6,793,027 B1Yamaha Hatsudoki Kabushiki Kaisha · 2004
- Method and system for controlling and recovering short duration bridge power to maximize backup power38US 7,060,379 B2Proton Energy Systems, Inc. · 2006