H05B 41/048
Using electromagnetic relays
Official title: {using electromagnetic relays}
H05B41/048 (Using electromagnetic relays) appears on 17 US grants and 2 published applications in this corpus.
Search patents in H05B- Granted patents
- 17
- Published applications
- 2
- Assignees
- 13
- Inventors
- 34
- Latest grant
- 10 Dec 2019
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 3 | 0 |
| 1978 | 1 | 0 |
| 1979 | 1 | 0 |
| 1980 | 1 | 0 |
| 1981 | 2 | 0 |
| 1982 | 1 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 1 | 0 |
| 1986 | 1 | 0 |
| 1987 | 1 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 2 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 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 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 0 |
| 2013 | 0 | 0 |
| 2014 | 0 | 0 |
| 2015 | 0 | 0 |
| 2016 | 0 | 0 |
| 2017 | 0 | 0 |
| 2018 | 0 | 2 |
| 2019 | 2 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Protection circuit and illumination driving circuit10 Dec 2019US 10,506,684 B2Joulwatt Technology (Hangzhou) Co., Ltd.
- High PAR maintenance rate type high pressure sodium lamp with auxiliary starting switch26 Feb 2019US 10,217,624 B2Fanlight Co., Ltd.
- Control system for electrical lighting11 Sep 1990US 4,956,583 AEconolight Limited
- Igniting device for a high-pressure discharge lamp capable of battery voltage compensation6 Feb 1990US 4,899,085 AKabushiki Kaisha Toshiba
- Rapid-start fluorescent lamp power reducer28 Apr 1987US 4,661,745 AGTE Products Corporation
Most cited
By later US patents
- Starting and operating circuit for gas discharge lamp15US 4,286,193 AJohnson Electric Coil Company · 1981
- Starter unit for gas discharge lamps powered by alternating-current mains14US 4,337,418 A1982
- Ballast de-energizing circuit for high pressure metal vapor lamp system13US 4,206,385 AAdvance Transformer Company · 1980
- Rapid-start fluorescent lamp power reducer12US 4,661,745 AGTE Products Corporation · 1987
- Fluorescent lamp ballast circuit with magnetic switch8US 4,009,412 AGTE Sylvania Incorporated · 1977