H01H 51/20
With two or more independent armatures
Official title: with two or more independent armatures
H01H51/20 (With two or more independent armatures) appears on 30 US grants and 23 published applications in this corpus.
Search patents in H01H- Granted patents
- 30
- Published applications
- 23
- Assignees
- 28
- Inventors
- 61
- Latest grant
- 30 Sep 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1980 | 1 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 1 | 0 |
| 1986 | 1 | 0 |
| 1987 | 1 | 0 |
| 1988 | 0 | 0 |
| 1989 | 1 | 0 |
| 1990 | 1 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 1 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 1 |
| 2003 | 3 | 1 |
| 2004 | 1 | 2 |
| 2005 | 0 | 1 |
| 2006 | 0 | 0 |
| 2007 | 1 | 1 |
| 2008 | 0 | 1 |
| 2009 | 0 | 0 |
| 2010 | 0 | 1 |
| 2011 | 1 | 0 |
| 2012 | 0 | 1 |
| 2013 | 3 | 4 |
| 2014 | 3 | 1 |
| 2015 | 2 | 0 |
| 2016 | 0 | 2 |
| 2017 | 1 | 2 |
| 2018 | 2 | 0 |
| 2019 | 1 | 0 |
| 2020 | 0 | 1 |
| 2021 | 1 | 2 |
| 2022 | 1 | 1 |
| 2023 | 2 | 0 |
| 2024 | 0 | 1 |
| 2025 | 1 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Relay apparatus and safety switching device with relay apparatus30 Sep 2025US 12,431,308 B2Pilz GmbH & Co.KG
- Relay contactor dual linear actuator module system23 May 2023US 11,657,996 B2Hamilton Sundstrand Corporation
- Multi-directional switch24 Jan 2023US 11,562,866 B2Hyundai Motor Company
- Double-armature relay4 Oct 2022US 11,462,378 B2Elesta GmbH, Ostfildern (De) Zweigniederlassung Bad Ragaz
- Relay contactor dual linear actuator module system28 Sep 2021US 11,133,141 B2Hamilton Sundstrand Corporation
- Relay apparatus and safety switching device with relay apparatus7 Mar 2024US 2024/0079193 A1Pilz GmbH & Co.KG
- Relay contactor dual linear actuator module system13 Jan 2022US 2022/0013317 A1Hamilton Sundstrand Corporation
- Multi-directional switch24 Jun 2021US 2021/0193414 A1Hyundai Motor Company
- Double-armature relay4 Feb 2021US 2021/0035759 A1Elesta GmbH, Ostfildern (De) Zweigniederlassung Bad Ragaz
- Relay contactor dual linear actuator module system13 Aug 2020US 2020/0258708 A1Hamilton Sundstrand Corporation
Most cited
By later US patents
- Transfer switch22US 4,590,387 AAichi Electric Works Co., Ltd. · 1986
- Electromagnetic relay18US 4,956,623 ASiemens Aktiengesellschaft · 1990
- Electromagnet magnetic circuit with permanent-magnet armature16US 4,191,937 AManufacture Francaise d'Appareils Electriques de Mesure · 1980
- Worldwide adaptive multi-coil automatic transfer switch14US 7,868,484 B2International Business Machines Corporation · 2011
- Electro-magnetic relay having two armatures12US 4,682,133 ASiemens Aktiengesellschaft · 1987