H01H 21/20
Contact arrangements for providing make-before-break operation
Official title: Contact arrangements for providing make-before-break operation, e.g. for on-load tap-changing
H01H21/20 (Contact arrangements for providing make-before-break operation) appears on 11 US grants and 8 published applications in this corpus.
Search patents in H01H- Granted patents
- 11
- Published applications
- 8
- Assignees
- 8
- Inventors
- 23
- Latest grant
- 2 Jun 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1978 | 1 | 0 |
| 1979 | 1 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 1 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 1 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 1 | 1 |
| 2011 | 0 | 0 |
| 2012 | 0 | 0 |
| 2013 | 0 | 0 |
| 2014 | 0 | 0 |
| 2015 | 0 | 0 |
| 2016 | 0 | 1 |
| 2017 | 0 | 0 |
| 2018 | 0 | 0 |
| 2019 | 0 | 0 |
| 2020 | 1 | 1 |
| 2021 | 1 | 1 |
| 2022 | 2 | 2 |
| 2023 | 0 | 0 |
| 2024 | 0 | 1 |
| 2025 | 1 | 0 |
| 2026 | 1 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Trigger activated tools having activation lockouts2 Jun 2026US 12,646,662 B2Hubbell Incorporated
- Trip overload protection switch with reverse restart switching structure25 Feb 2025US 12,237,133 B2
- Overload protection switch with reverse restart switching structure15 Nov 2022US 11,501,941 B2
- Trigger activated tools having activation lockouts30 Aug 2022US 11,430,616 B2Hubbell Incorporated
- Trigger activated tools having activation lockouts9 Mar 2021US 10,943,746 B2Hubbell Incorporated
- Battery configuration contactor assembly13 Aug 2026US 2026/0237572 A1Sensata Technologies, Inc.
- Trip overload protection switch with reverse restart switching structure4 Apr 2024US 2024/0112874 A1
- Trigger activated tools having activation lockouts29 Dec 2022US 2022/0415584 A1Hubbell Incorporated
- Overload protection switch with reverse restart switching structure8 Sep 2022US 2022/0285119 A1
- Trigger activated tools having activation lockouts27 May 2021US 2021/0159028 A1Hubbell Incorporated
Most cited
By later US patents
- Control station switch19US 4,105,882 AColumbus McKinnon Corporation · 1978
- Electrical switch assembly including a separate interrupter switch11US 4,168,407 AAutomatic Switch Company · 1979
- Fail-safe residential circuit breaker7US 5,294,902 AGeneral Electric Company · 1994
- Actuation mechanism for a pistol grip having multiple actuation positions regions7US 7,857,226 B2Psion Teklogix Inc. · 2010
- Trigger activated tools having activation lockouts1US 10,600,584 B2Hubbel Incorporated · 2020