H01H 51/22
Polarised relays
Official title: Polarised relays {(H01H51/284 takes precedence)}
H01H51/22 (Polarised relays) appears on 540 US grants and 299 published applications in this corpus.
Search patents in H01H- Granted patents
- 540
- Published applications
- 299
- Assignees
- 226
- Inventors
- 891
- Latest grant
- 25 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 8 | 0 |
| 1977 | 3 | 0 |
| 1978 | 5 | 0 |
| 1979 | 6 | 0 |
| 1980 | 7 | 0 |
| 1981 | 6 | 0 |
| 1982 | 9 | 0 |
| 1983 | 4 | 0 |
| 1984 | 7 | 0 |
| 1985 | 17 | 0 |
| 1986 | 23 | 0 |
| 1987 | 19 | 0 |
| 1988 | 16 | 0 |
| 1989 | 10 | 0 |
| 1990 | 10 | 0 |
| 1991 | 15 | 0 |
| 1992 | 9 | 0 |
| 1993 | 13 | 0 |
| 1994 | 6 | 0 |
| 1995 | 6 | 0 |
| 1996 | 7 | 0 |
| 1997 | 9 | 0 |
| 1998 | 6 | 0 |
| 1999 | 16 | 0 |
| 2000 | 19 | 0 |
| 2001 | 8 | 3 |
| 2002 | 11 | 11 |
| 2003 | 12 | 15 |
| 2004 | 21 | 12 |
| 2005 | 9 | 11 |
| 2006 | 9 | 15 |
| 2007 | 7 | 6 |
| 2008 | 5 | 11 |
| 2009 | 10 | 16 |
| 2010 | 12 | 10 |
| 2011 | 12 | 8 |
| 2012 | 16 | 9 |
| 2013 | 13 | 24 |
| 2014 | 17 | 12 |
| 2015 | 15 | 22 |
| 2016 | 15 | 20 |
| 2017 | 19 | 11 |
| 2018 | 7 | 13 |
| 2019 | 16 | 6 |
| 2020 | 14 | 10 |
| 2021 | 4 | 10 |
| 2022 | 10 | 7 |
| 2023 | 4 | 9 |
| 2024 | 6 | 18 |
| 2025 | 7 | 4 |
| 2026 | 5 | 6 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- H01H 51/2209With rectilinearly movable armature214
- H01H 51/2272Comprising rockable armature, rocking movement around central axis parallel to the main137
- H01H 51/2227In which the movable part comprises at least one permanent magnet, sandwiched95
- H01H 51/2236Comprising pivotable armature, pivoting at extremity or bending point of armature68
- H01H 51/2263Comprising rotatable armature, rotating around central axis perpendicular to the main plane25
- H01H 51/24Without intermediate neutral position of rest10
- H01H 51/26With intermediate neutral position of rest4
Recent patents
- Magnetic latching relay25 Aug 2026US 12,719,002 B2Xiamen Hongfa Electric Power Controls Co., Ltd.
- XD relay with manual override knob25 Aug 2026US 12,719,004 B2
- Multi-phase electromagnetic relay18 Aug 2026US 12,712,140 B2Xiamen Hongfa Electric Power Controls Co., Ltd.
- Magnetic circuit system with enhanced initial electromagnetic attraction and high-voltage DC relay5 May 2026US 12,620,537 B2Xiamen Hongfa Electric Power Controls Co., Ltd.
- Electrical switching device with locking function14 Apr 2026US 12,603,240 B2Schaltbau GmbH
- Switching device27 Aug 2026US 2026/0253825 A1Ellenberger & Poensgen GmbH
- Magnetic circuit system with enhanced intial electromagnetic attraction and high-voltage dc relay20 Aug 2026US 2026/0245820 A1Xiamen Hongfa Electric Power Controls Co., Ltd.
- Electromagnetic drive unit30 Jul 2026US 2026/0221363 A1Eaton Intelligent Power Limited
- Relay9 Jul 2026US 2026/0196433 A1Xiamen Hongfa Electric Power Controls Co., Ltd.
- Relay16 Apr 2026US 2026/0106101 A1Xiamen Hongfa Signal Electronics Co., Ltd.
Most cited
By later US patents
- Actuator145US 5,256,998 ATechnische Entwicklungen Dr. Becker GmbH · 1993
- Actuators102US 4,253,493 A1981
- Contact device63US 8,138,872 B2OMRON Corporation · 2012
- Polarized electromagnetic relay62US 4,695,813 AMatsushita Electric Works, Ltd. · 1987
- Permanent magnet actuator mechanism62US 6,501,357 B2Quizix, Inc. · 2002