H02H 9/00
Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
H02H9/00 (Emergency protective circuit arrangements for limiting excess current or voltage without disconnection) appears on 6,614 US grants and 6,322 published applications in this corpus.
Search patents in H02H- Granted patents
- 6,614
- Published applications
- 6,322
- Assignees
- 2,359
- Inventors
- 12,659
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 32 | 0 |
| 1977 | 32 | 0 |
| 1978 | 28 | 0 |
| 1979 | 18 | 0 |
| 1980 | 17 | 0 |
| 1981 | 25 | 0 |
| 1982 | 28 | 0 |
| 1983 | 18 | 0 |
| 1984 | 33 | 0 |
| 1985 | 23 | 0 |
| 1986 | 32 | 0 |
| 1987 | 44 | 0 |
| 1988 | 28 | 0 |
| 1989 | 55 | 0 |
| 1990 | 51 | 0 |
| 1991 | 48 | 0 |
| 1992 | 54 | 0 |
| 1993 | 67 | 0 |
| 1994 | 55 | 0 |
| 1995 | 56 | 0 |
| 1996 | 77 | 0 |
| 1997 | 82 | 0 |
| 1998 | 106 | 0 |
| 1999 | 117 | 0 |
| 2000 | 93 | 0 |
| 2001 | 61 | 17 |
| 2002 | 78 | 60 |
| 2003 | 69 | 74 |
| 2004 | 66 | 77 |
| 2005 | 54 | 84 |
| 2006 | 58 | 122 |
| 2007 | 63 | 120 |
| 2008 | 74 | 117 |
| 2009 | 87 | 145 |
| 2010 | 105 | 119 |
| 2011 | 113 | 130 |
| 2012 | 111 | 214 |
| 2013 | 151 | 335 |
| 2014 | 257 | 390 |
| 2015 | 305 | 397 |
| 2016 | 325 | 371 |
| 2017 | 337 | 337 |
| 2018 | 303 | 392 |
| 2019 | 438 | 435 |
| 2020 | 376 | 457 |
| 2021 | 442 | 349 |
| 2022 | 406 | 355 |
| 2023 | 329 | 324 |
| 2024 | 298 | 334 |
| 2025 | 291 | 318 |
| 2026 | 198 | 249 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Methods and devices for managing power supply systems6 Oct 2026US 12,756,180 B2Comcast Cable Communications, LLC
- Electrostatic discharge circuit, display substrate, and display device6 Oct 2026US 12,756,181 B2Boe Technology Group Co., Ltd.
- Integrated circuit6 Oct 2026US 12,756,182 B2Via Labs, Inc.
- Semiconductor device6 Oct 2026US 12,756,183 B2Socionext Inc.
- Power switching system6 Oct 2026US 12,756,192 B2Delta Electronics, Inc.
- Communication device and communication system8 Oct 2026US 2026/0312399 A1Denso Corporation
- Electrostatic discharge (esd) protection circuit using tie-cell technique8 Oct 2026US 2026/0312400 A1Taiwan Semiconductor Manufacturing Company.Ltd
- Protection circuit and electronic device8 Oct 2026US 2026/0312401 A1KYOCERA Document Solutions Inc.
- Electrostatic discharge protection8 Oct 2026US 2026/0312402 A1Taiwan Semiconductor Manufacturing Company.Ltd
- Discharging of a damping capacitor8 Oct 2026US 2026/0312581 A1ams-OSRAM AG
Most cited
By later US patents
- Leakage current cancelling circuit for use with electrosurgical instrument498US 3,946,738 A1976
- Loudspeaker overload protection circuit293US 4,296,278 AAltec Corporation · 1981
- Thin film overvoltage protection devices271US 4,809,044 AEnergy Conversion Devices, Inc. · 1989
- Systems and methods for distributed series compensation of power lines using passive devices215US 7,835,128 B2Georgia Tech Research Corporation · 2010
- Automatic computer card insertion and removal algorithm201US 5,555,510 AIntel Corporation · 1996