H01H 50/44
Magnetic coils or windings
H01H50/44 (Magnetic coils or windings) appears on 530 US grants and 500 published applications in this corpus.
Search patents in H01H- Granted patents
- 530
- Published applications
- 500
- Assignees
- 236
- Inventors
- 1,088
- Latest grant
- 29 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 2 | 0 |
| 1978 | 0 | 0 |
| 1979 | 3 | 0 |
| 1980 | 3 | 0 |
| 1981 | 3 | 0 |
| 1982 | 1 | 0 |
| 1983 | 5 | 0 |
| 1984 | 7 | 0 |
| 1985 | 8 | 0 |
| 1986 | 7 | 0 |
| 1987 | 6 | 0 |
| 1988 | 4 | 0 |
| 1989 | 6 | 0 |
| 1990 | 6 | 0 |
| 1991 | 4 | 0 |
| 1992 | 4 | 0 |
| 1993 | 8 | 0 |
| 1994 | 5 | 0 |
| 1995 | 4 | 0 |
| 1996 | 8 | 0 |
| 1997 | 6 | 0 |
| 1998 | 5 | 0 |
| 1999 | 9 | 0 |
| 2000 | 5 | 0 |
| 2001 | 11 | 1 |
| 2002 | 9 | 10 |
| 2003 | 5 | 6 |
| 2004 | 9 | 8 |
| 2005 | 8 | 7 |
| 2006 | 6 | 7 |
| 2007 | 4 | 5 |
| 2008 | 1 | 10 |
| 2009 | 6 | 5 |
| 2010 | 6 | 6 |
| 2011 | 7 | 3 |
| 2012 | 6 | 16 |
| 2013 | 17 | 17 |
| 2014 | 9 | 9 |
| 2015 | 11 | 30 |
| 2016 | 20 | 29 |
| 2017 | 21 | 24 |
| 2018 | 17 | 27 |
| 2019 | 29 | 40 |
| 2020 | 28 | 46 |
| 2021 | 38 | 37 |
| 2022 | 39 | 35 |
| 2023 | 31 | 38 |
| 2024 | 33 | 25 |
| 2025 | 26 | 37 |
| 2026 | 14 | 22 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Relay circuit board29 Sep 2026US 12,749,639 B2Avary Holding (Shenzhen) Co., Limited.
- Electromagnetic relay8 Sep 2026US 12,731,748 B2Xiamen Hongfa Automotive Electronics Co., Ltd.
- Switch arrangement and method for operating a switch arrangement25 Aug 2026US 12,718,999 B2Siemens Aktiengesellschaft
- Electric switch28 Jul 2026US 12,695,041 B2TE Connectivity Austria GmbH
- Quantifiable electromagnetic relay and electronic energy meter7 Jul 2026US 12,674,826 B2Xiamen Hongfa Electric Power Controls Co., Ltd.
- Safety switch17 Sep 2026US 2026/0279712 A1Keyence Corporation
- Hermetically sealed high voltage contactor with improved arc quenching3 Sep 2026US 2026/0260830 A1Rincon Power, LLC
- Electromagnetic relay20 Aug 2026US 2026/0245819 A1OMRON Corporation
- Magnetic circuit system with enhanced intial electromagnetic attraction and high-voltage dc relay20 Aug 2026US 2026/0245820 A1Xiamen Hongfa Electric Power Controls Co., Ltd.
- Plug-in relay6 Aug 2026US 2026/0229434 A1Song Chuan Precision Co., Ltd.
Most cited
By later US patents
- Electromagnetic switching apparatus68US 6,911,884 B2Matsushita Electric Works, Ltd. · 2005
- Solenoid switch contact and mounting assembly60US 5,021,760 AClum Manufacturing Company, Inc. · 1991
- Microrelay and a method for producing the same53US 5,398,011 ASharp Kabushiki Kaisha · 1995
- Electronic component51US 9,320,162 B2Yazaki Corporation · 2016
- Switch38US 4,345,225 AStarkstrom Gummersbach GmbH · 1982