H01H 9/42
Impedances connected with contacts
H01H9/42 (Impedances connected with contacts) appears on 95 US grants and 69 published applications in this corpus.
Search patents in H01H- Granted patents
- 95
- Published applications
- 69
- Assignees
- 68
- Inventors
- 258
- Latest grant
- 9 Jun 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 7 | 0 |
| 1977 | 1 | 0 |
| 1978 | 1 | 0 |
| 1979 | 1 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 1 | 0 |
| 1986 | 1 | 0 |
| 1987 | 1 | 0 |
| 1988 | 1 | 0 |
| 1989 | 0 | 0 |
| 1990 | 2 | 0 |
| 1991 | 0 | 0 |
| 1992 | 1 | 0 |
| 1993 | 3 | 0 |
| 1994 | 0 | 0 |
| 1995 | 3 | 0 |
| 1996 | 2 | 0 |
| 1997 | 2 | 0 |
| 1998 | 1 | 0 |
| 1999 | 5 | 0 |
| 2000 | 3 | 0 |
| 2001 | 1 | 2 |
| 2002 | 3 | 5 |
| 2003 | 6 | 3 |
| 2004 | 3 | 4 |
| 2005 | 1 | 2 |
| 2006 | 3 | 3 |
| 2007 | 4 | 4 |
| 2008 | 3 | 1 |
| 2009 | 2 | 4 |
| 2010 | 1 | 2 |
| 2011 | 1 | 2 |
| 2012 | 3 | 1 |
| 2013 | 2 | 3 |
| 2014 | 2 | 5 |
| 2015 | 1 | 1 |
| 2016 | 3 | 4 |
| 2017 | 3 | 1 |
| 2018 | 2 | 1 |
| 2019 | 2 | 4 |
| 2020 | 3 | 1 |
| 2021 | 1 | 3 |
| 2022 | 2 | 2 |
| 2023 | 3 | 3 |
| 2024 | 2 | 1 |
| 2025 | 0 | 5 |
| 2026 | 2 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Generator circuit breaker9 Jun 2026US 12,651,896 B2Xi' An Jiaotong University
- Fault current limiting solid-state switching device26 May 2026US 12,640,557 B2
- High-voltage circuit disconnection17 Dec 2024US 12,170,179 B2Schneider Electric Industries SAS
- Circuit breaker having internal transient recovery voltage capacitor assembly9 Jul 2024US 12,033,818 B2Hitachi Energy Ltd
- Inrush current limiting enabled switch13 Jun 2023US 11,676,781 B1Dell Products L. P.
- Electrical installation with means for switching series electric arcs9 Jul 2026US 2026/0192677 A1Safran Electrical & Power
- Switching apparatus for electrical systems11 Jun 2026US 2026/0162920 A1
- Fault current limiting solid-state switching device7 Aug 2025US 2025/0253648 A1ABB Schweiz AG
- No-arc on-load tap changer, switching control method and electrical equipment3 Jul 2025US 2025/0218654 A1
- Contactor With Multiple Contacts for Conducting and Limiting a Current26 Jun 2025US 2025/0210284 A1Bayerische Motoren Werke Aktiengesellschaft
Most cited
By later US patents
- Arc resistant high voltage micromachined electrostatic switch123US 6,057,520 AMcnc · 2000
- Fault current interrupter55US 4,583,146 AGeneral Electric Company · 1986
- Circuit breakers with PTC (Positive Temperature Coefficient resistivity38US 5,886,860 ASquare D Company · 1999
- Temperature monitoring and control system31US 6,145,752 A2000
- Micro electro-mechanical systems relay30US 5,959,338 AHoneywell Inc. · 1999