H01H 50/541
Auxiliary contact devices
Official title: {Auxiliary contact devices}
H01H50/541 (Auxiliary contact devices) appears on 210 US grants and 192 published applications in this corpus.
Search patents in H01H- Granted patents
- 210
- Published applications
- 192
- Assignees
- 124
- Inventors
- 469
- Latest grant
- 8 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 5 | 0 |
| 1977 | 4 | 0 |
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 1 | 0 |
| 1981 | 2 | 0 |
| 1982 | 3 | 0 |
| 1983 | 1 | 0 |
| 1984 | 4 | 0 |
| 1985 | 1 | 0 |
| 1986 | 2 | 0 |
| 1987 | 4 | 0 |
| 1988 | 5 | 0 |
| 1989 | 1 | 0 |
| 1990 | 1 | 0 |
| 1991 | 6 | 0 |
| 1992 | 5 | 0 |
| 1993 | 5 | 0 |
| 1994 | 3 | 0 |
| 1995 | 3 | 0 |
| 1996 | 1 | 0 |
| 1997 | 3 | 0 |
| 1998 | 0 | 0 |
| 1999 | 3 | 0 |
| 2000 | 2 | 0 |
| 2001 | 2 | 0 |
| 2002 | 3 | 5 |
| 2003 | 10 | 13 |
| 2004 | 6 | 3 |
| 2005 | 6 | 3 |
| 2006 | 5 | 2 |
| 2007 | 1 | 3 |
| 2008 | 2 | 3 |
| 2009 | 1 | 1 |
| 2010 | 3 | 5 |
| 2011 | 2 | 4 |
| 2012 | 3 | 7 |
| 2013 | 8 | 4 |
| 2014 | 2 | 5 |
| 2015 | 3 | 12 |
| 2016 | 9 | 5 |
| 2017 | 9 | 7 |
| 2018 | 7 | 13 |
| 2019 | 11 | 12 |
| 2020 | 6 | 10 |
| 2021 | 10 | 5 |
| 2022 | 10 | 5 |
| 2023 | 2 | 14 |
| 2024 | 6 | 18 |
| 2025 | 12 | 17 |
| 2026 | 5 | 16 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Magnetic latching relay with microswitch8 Sep 2026US 12,731,746 B2Xiamen Hongfa Electric Power Controls Co., Ltd.
- Elastic member and relay11 Aug 2026US 12,706,265 B2Tyco Electronics (Shanghai) Co., Ltd.
- Electromechanical relay and monitoring switch for an electromechanical relay4 Aug 2026US 12,700,556 B2TE Connectivity Solutions GmbH
- Relay28 Apr 2026US 12,614,687 B2BYD Company Limited
- Electrical contactor suitable for high-power electrical circuits, and aircraft comprising an electrical circuit integrating at least one such electrical contactor28 Apr 2026US 12,614,689 B2Airbus Operations GmbH
- Single-phase contactor actuation mechanism27 Aug 2026US 2026/0253826 A1Safran Power USA, LLC
- Protection device, protection circuit and battery system13 Aug 2026US 2026/0237809 A1Xiamen Hongfa Electric Power Controls Co., Ltd.
- High voltage relay with voltage sampling30 Jul 2026US 2026/0221362 A1Fca US LLC
- Circuit breaker23 Jul 2026US 2026/0213102 A1Ellenberger & Poensgen GmbH
- Electrical installation with means for extinguishing series electric arcs, in particular in a contactor16 Jul 2026US 2026/0200329 A1Safran Electrical & Power
Most cited
By later US patents
- Electric switch mechanism for relays and contactors87US 4,983,788 ACGE Compagnia Generale Electtromeccanica S.p.A. · 1991
- Auxiliary contact mounting block82US 5,138,121 ASiemens Aktiengesellschaft · 1992
- Arc suppressor circuit67US 3,982,137 APower Management Corporation · 1976
- Remote control residential circuit breaker55US 5,301,083 AEaton Corporation · 1994
- Arc suppression device and method48US 4,525,762 A1985