H02H 3/162
For ac systems
Official title: {for AC systems}
H02H3/162 (For ac systems) appears on 361 US grants and 338 published applications in this corpus.
Search patents in H02H- Granted patents
- 361
- Published applications
- 338
- Assignees
- 194
- Inventors
- 656
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 4 | 0 |
| 1978 | 3 | 0 |
| 1979 | 1 | 0 |
| 1980 | 6 | 0 |
| 1981 | 0 | 0 |
| 1982 | 2 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 1 | 0 |
| 1986 | 2 | 0 |
| 1987 | 1 | 0 |
| 1988 | 0 | 0 |
| 1989 | 1 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 1 | 0 |
| 1993 | 0 | 0 |
| 1994 | 1 | 0 |
| 1995 | 2 | 0 |
| 1996 | 1 | 0 |
| 1997 | 3 | 0 |
| 1998 | 4 | 0 |
| 1999 | 3 | 0 |
| 2000 | 0 | 0 |
| 2001 | 2 | 1 |
| 2002 | 4 | 0 |
| 2003 | 4 | 0 |
| 2004 | 0 | 2 |
| 2005 | 0 | 3 |
| 2006 | 1 | 2 |
| 2007 | 4 | 2 |
| 2008 | 1 | 6 |
| 2009 | 2 | 4 |
| 2010 | 4 | 3 |
| 2011 | 7 | 8 |
| 2012 | 4 | 6 |
| 2013 | 12 | 18 |
| 2014 | 10 | 26 |
| 2015 | 20 | 22 |
| 2016 | 15 | 21 |
| 2017 | 27 | 32 |
| 2018 | 21 | 27 |
| 2019 | 23 | 24 |
| 2020 | 24 | 23 |
| 2021 | 38 | 26 |
| 2022 | 25 | 13 |
| 2023 | 18 | 25 |
| 2024 | 28 | 19 |
| 2025 | 13 | 16 |
| 2026 | 14 | 9 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Self-test auto monitor ground fault circuit interrupter (GFCI) with power denial6 Oct 2026US 12,754,232 B2Hubbell Incorporated
- Plug-type electric discharge detection unit and electric discharge detection system22 Sep 2026US 12,742,808 B2Nitto Kogyo Co., Ltd.
- Method for checking the adequacy at the residual currents of differential circuit breakers18 Aug 2026US 12,712,355 B2Chauvin Arnoux
- Protective wiring device11 Aug 2026US 12,706,266 B2Pass & Seymour, Inc.
- Power cord photocoupler leakage current detection interrupter (LCDI) and electrical appliance using same7 Jul 2026US 12,676,467 B2Dongguan Tuccheng Industrial Co., Ltd
- Ground Fault Circuit Interrupter with Solid State Relay-Controlled Electromagnetic Contactor and Self-Test End of Life (STEOL) Circuits for High-Current Applications24 Sep 2026US 2026/0291206 A1Tower Manufacturing Corporation
- New energy power station grounding protection system, method, electronic device, and storage medium6 Aug 2026US 2026/0229871 A1Shanxi Yingrun New Energy Co., Ltd
- Modular Facts Devices with External Fault Current Protection19 Mar 2026US 2026/0081417 A1Smart Wires Inc.
- Leakage protection device5 Mar 2026US 2026/0066642 A1
- Leakage protection devices, electrical connection equipment and electrical appliances5 Mar 2026US 2026/0066643 A1
Most cited
By later US patents
- Safety monitoring circuit for electrosurgical unit224US 4,231,372 AValleylab, Inc. · 1980
- Electrosurgical safety circuit151US 4,200,105 ADentsply Research & Development Corp. · 1980
- Plug tail systems55US 9,030,789 B2Pass & Seymour, Inc. · 2015
- Plug tail lighting switch and control system54US 8,267,719 B1Pass & Seymour, Inc. · 2012
- Ground fault detection device for motor driving circuit44US 7,586,285 B2OMRON Corporation · 2009