H01H 61/00
Electrothermal relays
Official title: Electrothermal relays (thermal switches not operated by electrical input, thermal switches with anticipating electrical input H01H37/00; thermally-sensitive members H01H37/32)
H01H61/00 (Electrothermal relays) appears on 542 US grants and 315 published applications in this corpus.
Search patents in H01H- Granted patents
- 542
- Published applications
- 315
- Assignees
- 276
- Inventors
- 879
- Latest grant
- 24 Mar 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 11 | 0 |
| 1977 | 7 | 0 |
| 1978 | 15 | 0 |
| 1979 | 8 | 0 |
| 1980 | 8 | 0 |
| 1981 | 5 | 0 |
| 1982 | 13 | 0 |
| 1983 | 11 | 0 |
| 1984 | 8 | 0 |
| 1985 | 14 | 0 |
| 1986 | 4 | 0 |
| 1987 | 12 | 0 |
| 1988 | 10 | 0 |
| 1989 | 14 | 0 |
| 1990 | 8 | 0 |
| 1991 | 13 | 0 |
| 1992 | 5 | 0 |
| 1993 | 7 | 0 |
| 1994 | 5 | 0 |
| 1995 | 10 | 0 |
| 1996 | 5 | 0 |
| 1997 | 4 | 0 |
| 1998 | 5 | 0 |
| 1999 | 16 | 0 |
| 2000 | 17 | 0 |
| 2001 | 21 | 2 |
| 2002 | 19 | 17 |
| 2003 | 21 | 30 |
| 2004 | 31 | 33 |
| 2005 | 18 | 21 |
| 2006 | 14 | 18 |
| 2007 | 14 | 22 |
| 2008 | 9 | 17 |
| 2009 | 21 | 15 |
| 2010 | 19 | 9 |
| 2011 | 10 | 7 |
| 2012 | 11 | 7 |
| 2013 | 6 | 6 |
| 2014 | 1 | 18 |
| 2015 | 12 | 16 |
| 2016 | 15 | 11 |
| 2017 | 14 | 12 |
| 2018 | 12 | 8 |
| 2019 | 8 | 8 |
| 2020 | 8 | 10 |
| 2021 | 4 | 4 |
| 2022 | 6 | 6 |
| 2023 | 5 | 7 |
| 2024 | 3 | 5 |
| 2025 | 3 | 5 |
| 2026 | 2 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- H01H 2061/006Micromechanical thermal relayIndexing code185
- H01H 61/01Details171
- H01H 61/02Wherein the thermally-sensitive member is heated indirectly168
- H01H 61/002Structural combination of a time delay electrothermal relay with an electrothermal protective76
- H01H 61/04Wherein the thermally-sensitive member is only heated directly60
- H01H 61/06Self-interrupters, i.e. with periodic or other repetitive opening and closing of contacts25
Recent patents
- Protecting device and battery pack24 Mar 2026US 12,586,823 B2Dexerials Corporation
- Active, dynamic, and reversible shape memory alloy film thermo-mechanical safety switches6 Jan 2026US 12,519,190 B2
- Thermal protection device to withstand high voltage4 Nov 2025US 12,462,957 B2Littelfuse, Inc.
- Motor locking mechanism including memory alloy wire1 Jul 2025US 12,348,114 B2Sz Dji Technology Co., Ltd.
- Electrically controlled solid-state thermal switch1 Apr 2025US 12,266,494 B2Ohio State Innovation Foundation
- Shape Memory Alloy Sensing And Actuation Switch29 Jan 2026US 2026/0031285 A1Hutchinson Technology Incorporated
- Active, dynamic, and reversible shape memory alloy film thermo-mechanical safety switches23 Oct 2025US 2025/0329897 A1
- Thermodynamic computing relay gadget11 Sep 2025US 2025/0284867 A1Extropic Corp.
- Motor locking mechanism including memory alloy wire11 Sep 2025US 2025/0286434 A1Sz Dji Technology Co., Ltd.
- Electrically controlled solid-state thermal switch21 Aug 2025US 2025/0266228 A1Ohio State Innovation Foundation
Most cited
By later US patents
- Shape-memory alloy micro-actuator445US 5,061,914 ATiNi Alloy Company · 1991
- Thin film shape memory alloy and method for producing411US 4,864,824 AAmerican Telephone and Telegraph Company, AT&T Bell Laboratories · 1989
- Thin-film electrothermal device331US 4,423,401 ATektronix, Inc. · 1983
- Microprobe240US 5,475,318 ARoxburgh Ltd. · 1995
- System for remotely controlling energy distribution at local sites236US 6,832,135 B2Yingco Electronic Inc. · 2004