H01H 2001/506
Fail safe contacts, i.e. the contacts being kept in a safe position
Official title: {Fail safe contacts, i.e. the contacts being kept in a safe position, usually in an open circuit position, at end of life time of switch}
H01H2001/506 (Fail safe contacts, i.e. the contacts being kept in a safe position) appears on 23 US grants and 17 published applications in this corpus.
Search patents in H01H- Granted patents
- 23
- Published applications
- 17
- Assignees
- 10
- Inventors
- 24
- Latest grant
- 11 Feb 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1998 | 1 | 0 |
| 1999 | 1 | 0 |
| 2000 | 1 | 0 |
| 2001 | 1 | 0 |
| 2002 | 1 | 1 |
| 2003 | 2 | 0 |
| 2004 | 0 | 1 |
| 2005 | 0 | 0 |
| 2006 | 1 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 1 |
| 2009 | 0 | 0 |
| 2010 | 1 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 0 |
| 2013 | 0 | 0 |
| 2014 | 0 | 0 |
| 2015 | 0 | 0 |
| 2016 | 0 | 1 |
| 2017 | 1 | 0 |
| 2018 | 0 | 0 |
| 2019 | 1 | 0 |
| 2020 | 3 | 6 |
| 2021 | 3 | 2 |
| 2022 | 2 | 2 |
| 2023 | 1 | 2 |
| 2024 | 2 | 1 |
| 2025 | 1 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Protection device11 Feb 2025US 12,224,145 B2Littelfuse Japan G.K.
- Contactor control30 Jan 2024US 11,887,795 B2ABB Schweiz AG
- Power contact fault clearing device2 Jan 2024US 11,862,408 B2Arc Suppression Technologies
- Power contact health assessor apparatus and method14 Feb 2023US 11,581,151 B2Arc Suppression Technologies
- Wet/dry contact sequencer31 May 2022US 11,348,742 B2Arc Suppression Technologies
- Power Contact Health Assessor Apparatus and Method15 Feb 2024US 2024/0055195 A1Arc Suppression Technologies
- Contactor control19 Oct 2023US 2023/0335359 A1ABB Schweiz AG
- Protection device30 Mar 2023US 2023/0097068 A1Littelfuse Japan G.K.
- Power Contact Health Assessor Apparatus and Method12 May 2022US 2022/0148822 A1Arc Suppression Technologies
- Power Contact Fault Clearing Device10 Feb 2022US 2022/0044882 A1Arc Suppression Technologies
Most cited
By later US patents
- Method and apparatus for monitoring wellness of contactors and starters32US 7,705,601 B2Eaton Corporation · 2010
- Magnetic drives27US 6,598,621 B1Camcon Ltd. · 2003
- Electronically controlled switching device16US 5,815,057 AK & L Microwave, Inc. · 1998
- Electrical apparatus having improved electrical contact and electrical contact used therewith15US 6,281,780 B1Texas Instruments Incorporated · 2001
- Switching device8US 6,005,459 AK & L Microwave, Inc. · 1999