H01H 33/16
Impedances connected with contacts
H01H33/16 (Impedances connected with contacts) appears on 249 US grants and 114 published applications in this corpus.
Search patents in H01H- Granted patents
- 249
- Published applications
- 114
- Assignees
- 95
- Inventors
- 531
- Latest grant
- 25 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 6 | 0 |
| 1978 | 9 | 0 |
| 1979 | 1 | 0 |
| 1980 | 2 | 0 |
| 1981 | 4 | 0 |
| 1982 | 5 | 0 |
| 1983 | 6 | 0 |
| 1984 | 11 | 0 |
| 1985 | 9 | 0 |
| 1986 | 8 | 0 |
| 1987 | 5 | 0 |
| 1988 | 3 | 0 |
| 1989 | 5 | 0 |
| 1990 | 2 | 0 |
| 1991 | 2 | 0 |
| 1992 | 6 | 0 |
| 1993 | 10 | 0 |
| 1994 | 10 | 0 |
| 1995 | 7 | 0 |
| 1996 | 5 | 0 |
| 1997 | 7 | 0 |
| 1998 | 10 | 0 |
| 1999 | 4 | 0 |
| 2000 | 4 | 0 |
| 2001 | 4 | 1 |
| 2002 | 4 | 1 |
| 2003 | 5 | 3 |
| 2004 | 1 | 2 |
| 2005 | 2 | 2 |
| 2006 | 3 | 3 |
| 2007 | 1 | 2 |
| 2008 | 1 | 4 |
| 2009 | 1 | 5 |
| 2010 | 4 | 5 |
| 2011 | 0 | 3 |
| 2012 | 6 | 9 |
| 2013 | 8 | 5 |
| 2014 | 4 | 11 |
| 2015 | 9 | 8 |
| 2016 | 8 | 4 |
| 2017 | 7 | 5 |
| 2018 | 4 | 2 |
| 2019 | 6 | 5 |
| 2020 | 3 | 5 |
| 2021 | 4 | 6 |
| 2022 | 4 | 8 |
| 2023 | 4 | 3 |
| 2024 | 7 | 6 |
| 2025 | 1 | 2 |
| 2026 | 4 | 4 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- H01H 33/161Variable impedances76
- H01H 33/166The impedance being inserted only while closing the switch52
- H01H 33/168The impedance being inserted both while closing and while opening the switch22
- H01H 33/165Details concerning the impedances20
- H01H 33/167The impedance being inserted only while opening the switch20
- H01H 33/164The impedance being inserted in the circuit by blowing the arc onto4
Recent patents
- Vacuum circuit breaker25 Aug 2026US 12,718,997 B2Mitsubishi Electric Corporation
- Electrical switching arrangement11 Aug 2026US 12,706,257 B2Eaton Intelligent Power Limited
- Direct current circuit breaker31 Mar 2026US 12,592,566 B2Mitsubishi Electric Corporation
- Loadbreak assembly24 Feb 2026US 12,562,525 B2Hubbell Incorporated
- Relay switch device integrated with pre-charge system18 Feb 2025US 12,230,465 B2LG Energy Solution, Ltd.
- Hybrid switch assembly and circuit interrupter including the same17 Sep 2026US 2026/0279700 A1Eaton Intelligent Power Limited
- Electro-mechanical circuit interrupter16 Jul 2026US 2026/0204893 A1Leach International Corporation
- Loadbreak assembly9 Jul 2026US 2026/0196765 A1
- Rc arrangements for switching inductive currents, using high-voltage vacuum switches5 Feb 2026US 2026/0038755 A1Siemens Energy Global GmbH & Co. KG
- Relay Switch Device Integrated With Pre-Charge System22 May 2025US 2025/0166952 A1LG Energy Solution, Ltd.
Most cited
By later US patents
- Current limiting device117US 5,614,881 AGeneral Electric Company · 1997
- Fault current interrupter55US 4,583,146 AGeneral Electric Company · 1986
- Conductive liquid compositions and electrical circuit protection devices comprising conductive liquid compositions50US 5,581,192 AEaton Corporation · 1996
- Assemblies of PTC circuit protection devices48US 4,967,176 ARaychem Corporation · 1990
- Eddy current inductive drive electromechanical liner actuator and switching arrangement45US 7,777,600 B2PowerPath Technologies LLC · 2010