H01H 3/28
Using electromagnet
Official title: using electromagnet (for storing energy in a spring motor H01H3/30; for operating relays H01H45/00)
H01H3/28 (Using electromagnet) appears on 161 US grants and 156 published applications in this corpus.
Search patents in H01H- Granted patents
- 161
- Published applications
- 156
- Assignees
- 97
- Inventors
- 419
- Latest grant
- 12 May 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 1 | 0 |
| 1978 | 1 | 0 |
| 1979 | 5 | 0 |
| 1980 | 0 | 0 |
| 1981 | 3 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 2 | 0 |
| 1986 | 0 | 0 |
| 1987 | 1 | 0 |
| 1988 | 1 | 0 |
| 1989 | 2 | 0 |
| 1990 | 1 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 1 | 0 |
| 1995 | 0 | 0 |
| 1996 | 2 | 0 |
| 1997 | 1 | 0 |
| 1998 | 1 | 0 |
| 1999 | 0 | 0 |
| 2000 | 2 | 0 |
| 2001 | 2 | 1 |
| 2002 | 1 | 0 |
| 2003 | 2 | 2 |
| 2004 | 2 | 1 |
| 2005 | 1 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 1 |
| 2008 | 0 | 1 |
| 2009 | 0 | 1 |
| 2010 | 1 | 2 |
| 2011 | 1 | 3 |
| 2012 | 2 | 7 |
| 2013 | 4 | 11 |
| 2014 | 13 | 11 |
| 2015 | 14 | 18 |
| 2016 | 9 | 4 |
| 2017 | 9 | 13 |
| 2018 | 8 | 10 |
| 2019 | 13 | 13 |
| 2020 | 8 | 8 |
| 2021 | 8 | 10 |
| 2022 | 10 | 12 |
| 2023 | 9 | 9 |
| 2024 | 11 | 7 |
| 2025 | 6 | 6 |
| 2026 | 2 | 5 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Monitoring system for a mechanically driven circuit breaker12 May 2026US 12,625,181 B2ABB Schweiz AG
- Automatic transfer switch10 Feb 2026US 12,548,718 B2Kutai Electronics Industry Co., Ltd.
- Contactor monitoring2 Dec 2025US 12,488,949 B2ABB Schweiz AG
- Circuit breaker27 May 2025US 12,311,784 B2Ellenberger & Poensgen GmbH
- Contactor with multi-gap actuator20 May 2025US 12,308,190 B2TE Connectivity Solutions GmbH
- Dead Short Switch and Method of Use10 Sep 2026US 2026/0266144 A1Gunnar LLLP
- Switching device30 Jul 2026US 2026/0221352 A1Ellenberger & Poensgen GmbH
- Ring-shaped wearable devices, systems, and methods of use thereof26 Mar 2026US 2026/0086637 A1Lotus Laboratories Inc.
- Apparatus for controlling circuit breaker module, energy storage system, and microgrid system22 Jan 2026US 2026/0024983 A1Contemporary Amperex Technology Co., Limited
- Circuit breaker8 Jan 2026US 2026/0011517 A1Schneider Electric Industries SAS
Most cited
By later US patents
- Electromagnetic actuators55US 6,285,270 B1Fki PLC · 2001
- Controller having interchangeable vacuum or air break contactors and having easily serviced parts52US 4,839,477 ASquare D Company · 1989
- Automatic transfer switch40US 3,936,782 AAutomatic Switch Company · 1976
- Fully rated contact system having normally open contact and normally closed contacts38US 8,653,913 B2TE Connectivity India Private Limited · 2014
- Operation apparatus of circuit breaker32US 6,020,567 AKabushiki Kaisha Toshiba · 2000