H01H 51/28
Relays having both armature and contacts within a sealed casing outside which
Official title: Relays having both armature and contacts within a sealed casing outside which the operating coil is located, e.g. contact carried by a magnetic leaf spring or reed (H01H51/27 takes precedence)
H01H51/28 (Relays having both armature and contacts within a sealed casing outside which) appears on 147 US grants and 54 published applications in this corpus.
Search patents in H01H- Granted patents
- 147
- Published applications
- 54
- Assignees
- 90
- Inventors
- 239
- Latest grant
- 25 Nov 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 13 | 0 |
| 1977 | 10 | 0 |
| 1978 | 4 | 0 |
| 1979 | 6 | 0 |
| 1980 | 10 | 0 |
| 1981 | 3 | 0 |
| 1982 | 1 | 0 |
| 1983 | 3 | 0 |
| 1984 | 0 | 0 |
| 1985 | 2 | 0 |
| 1986 | 0 | 0 |
| 1987 | 2 | 0 |
| 1988 | 3 | 0 |
| 1989 | 4 | 0 |
| 1990 | 3 | 0 |
| 1991 | 3 | 0 |
| 1992 | 3 | 0 |
| 1993 | 3 | 0 |
| 1994 | 0 | 0 |
| 1995 | 4 | 0 |
| 1996 | 6 | 0 |
| 1997 | 3 | 0 |
| 1998 | 2 | 0 |
| 1999 | 7 | 0 |
| 2000 | 3 | 0 |
| 2001 | 3 | 1 |
| 2002 | 3 | 2 |
| 2003 | 1 | 3 |
| 2004 | 2 | 2 |
| 2005 | 2 | 2 |
| 2006 | 1 | 0 |
| 2007 | 0 | 1 |
| 2008 | 1 | 0 |
| 2009 | 0 | 1 |
| 2010 | 1 | 1 |
| 2011 | 2 | 0 |
| 2012 | 1 | 1 |
| 2013 | 0 | 1 |
| 2014 | 2 | 3 |
| 2015 | 0 | 4 |
| 2016 | 5 | 4 |
| 2017 | 1 | 4 |
| 2018 | 2 | 5 |
| 2019 | 8 | 5 |
| 2020 | 3 | 1 |
| 2021 | 1 | 5 |
| 2022 | 2 | 1 |
| 2023 | 2 | 3 |
| 2024 | 3 | 0 |
| 2025 | 3 | 3 |
| 2026 | 0 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Connecting structure between lead-out pins of auxiliary stationary contacts and yoke plate of DC relay25 Nov 2025US 12,482,621 B2Xiamen Hongfa Electric Power Controls Co., Ltd.
- Switching device with at least one movable contact, at least one auxiliary contact, at least one spring contact and a contact plate21 Oct 2025US 12,451,312 B2TDK Electronics Co., Ltd.
- Switching device15 Jul 2025US 12,362,118 B2TDK Electronics Co., Ltd.
- Switching device9 Apr 2024US 11,955,301 B2TDK Electronics Co., Ltd.
- Switching device26 Mar 2024US 11,942,298 B2TDK Electronics Co., Ltd.
- Electromagnetic reed switch relay with small cross capacitance30 Jul 2026US 2026/0221364 A1Pro-Tech Inlab, Limited Liability Company
- Connecting structure between lead-out pins of auxiliary stationary contacts and yoke plate of dc relay13 Nov 2025US 2025/0349480 A1Xiamen Hongfa Electric Power Controls Co., Ltd.
- Switching device9 Oct 2025US 2025/0316431 A1TDK Electronics Co., Ltd.
- Household gas stove14 Aug 2025US 2025/0257877 A1BSH Hausgeräte GmbH
- Switching device22 Jun 2023US 2023/0197384 A1TDK Electronics Co., Ltd.
Most cited
By later US patents
- Sealed contact device with contact gap adjustment capability102US 5,892,194 AMatsushita Electric Works, Ltd. · 1999
- Magnetically controlled switch with wetted contact74US 4,238,748 AOrega Circuits et Commutation · 1980
- Electromagnetic switching apparatus68US 6,911,884 B2Matsushita Electric Works, Ltd. · 2005
- Transformed current sensing relay for use in switched network modems and circuit incorporating same51US 5,426,698 AGeneral DataComm, Inc. · 1995
- Sealed relay device40US 5,519,370 AKilovac Corporation · 1996