H05B 41/2855
Against abnormal lamp operating conditions
Official title: {against abnormal lamp operating conditions}
H05B41/2855 (Against abnormal lamp operating conditions) appears on 367 US grants and 255 published applications in this corpus.
Search patents in H05B- Granted patents
- 367
- Published applications
- 255
- Assignees
- 175
- Inventors
- 540
- Latest grant
- 24 Apr 2018
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 3 | 0 |
| 1978 | 2 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 2 | 0 |
| 1982 | 2 | 0 |
| 1983 | 3 | 0 |
| 1984 | 1 | 0 |
| 1985 | 3 | 0 |
| 1986 | 1 | 0 |
| 1987 | 2 | 0 |
| 1988 | 0 | 0 |
| 1989 | 4 | 0 |
| 1990 | 3 | 0 |
| 1991 | 9 | 0 |
| 1992 | 5 | 0 |
| 1993 | 4 | 0 |
| 1994 | 8 | 0 |
| 1995 | 10 | 0 |
| 1996 | 6 | 0 |
| 1997 | 9 | 0 |
| 1998 | 11 | 0 |
| 1999 | 12 | 0 |
| 2000 | 11 | 0 |
| 2001 | 16 | 2 |
| 2002 | 15 | 16 |
| 2003 | 14 | 15 |
| 2004 | 16 | 23 |
| 2005 | 7 | 27 |
| 2006 | 16 | 31 |
| 2007 | 23 | 26 |
| 2008 | 34 | 34 |
| 2009 | 19 | 26 |
| 2010 | 16 | 22 |
| 2011 | 30 | 11 |
| 2012 | 16 | 9 |
| 2013 | 14 | 5 |
| 2014 | 9 | 4 |
| 2015 | 6 | 1 |
| 2016 | 1 | 2 |
| 2017 | 2 | 1 |
| 2018 | 1 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Ballast with battery backup24 Apr 2018US 9,954,390 B2Fulham Company Limited
- LED backlight driving circuit1 Aug 2017US 9,723,684 B2Shenzhen China Star Optoelectronics Technology Co., Ltd.
- Light emitting diode driving chip having eight or six pins, driving system using the light emitting diode driving chip, and related method thereof27 Jun 2017US 9,693,418 B2Wistron Corporation
- Method to detect uneven AC load or parallel load removal25 Oct 2016US 9,480,126 B1Universal Lighting Technologies, Inc.
- Fault condition of detection circuit14 Jul 2015US 9,084,304 B2Osram Sylvania Inc.
- Led backlight driving circuit25 May 2017US 2017/0150572 A1Shenzhen China Star Optoelectronics Technology Co., Ltd.
- Light emitting diode driving chip having eight or six pins, drving system using the light emitting diode driving chip, and related method thereof18 Feb 2016US 2016/0050732 A1Wistron Corporation
- System and method for electronic device control in the presence of electrical arcing28 Jan 2016US 2016/0029465 A1Koninklijke Philips N. V.
- Ballast with battery backup31 Dec 2015US 2015/0380983 A1Fulham Company Limited
- Ballast and ballast control method and apparatus, for example anti-arcing control for electronic ballast20 Nov 2014US 2014/0339996 A1Fulham Company Limited
Most cited
By later US patents
- Inverter oscillator with current feedback152US 4,127,797 AIota Engineering Co. · 1978
- High-efficiency adaptive DC/AC converter147US 6,259,615 B1O2 Micro International Limited · 2001
- Drive device and drive method for a cold cathode fluorescent lamp142US 6,566,821 B2Matsushita Electric Industrial Co., Ltd. · 2003
- High-efficiency adaptive DC/AC converter126US 6,396,722 B2Micro International Limited · 2002
- Electronic ballast with interface circuitry for multiple dimming inputs124US 5,691,605 APhilips Electronics North America Corporation · 1997