H05B 41/232
For low-pressure lamps
Official title: for low-pressure lamps
H05B41/232 (For low-pressure lamps) appears on 124 US grants and 17 published applications in this corpus.
Search patents in H05B- Granted patents
- 124
- Published applications
- 17
- Assignees
- 56
- Inventors
- 160
- Latest grant
- 10 May 2016
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 6 | 0 |
| 1977 | 4 | 0 |
| 1978 | 3 | 0 |
| 1979 | 2 | 0 |
| 1980 | 4 | 0 |
| 1981 | 2 | 0 |
| 1982 | 5 | 0 |
| 1983 | 4 | 0 |
| 1984 | 5 | 0 |
| 1985 | 6 | 0 |
| 1986 | 5 | 0 |
| 1987 | 5 | 0 |
| 1988 | 5 | 0 |
| 1989 | 1 | 0 |
| 1990 | 6 | 0 |
| 1991 | 4 | 0 |
| 1992 | 9 | 0 |
| 1993 | 6 | 0 |
| 1994 | 2 | 0 |
| 1995 | 4 | 0 |
| 1996 | 2 | 0 |
| 1997 | 1 | 0 |
| 1998 | 2 | 0 |
| 1999 | 6 | 0 |
| 2000 | 3 | 0 |
| 2001 | 2 | 0 |
| 2002 | 3 | 3 |
| 2003 | 4 | 2 |
| 2004 | 4 | 3 |
| 2005 | 1 | 2 |
| 2006 | 1 | 0 |
| 2007 | 1 | 1 |
| 2008 | 0 | 0 |
| 2009 | 1 | 0 |
| 2010 | 0 | 1 |
| 2011 | 0 | 0 |
| 2012 | 1 | 1 |
| 2013 | 0 | 1 |
| 2014 | 1 | 3 |
| 2015 | 1 | 0 |
| 2016 | 2 | 0 |
By publication year. Applications have been published since 2001.
Subgroups
Granted patents
Recent patents
- Gas light system and method10 May 2016US 9,338,865 B2
- Power supply for a field emission light source12 Jan 2016US 9,237,622 B2Lightlab Sweden AB
- System and method for ignition and operation of a high intensity discharge lamp28 Jul 2015US 9,095,034 B2Greentek Green Solutions (2009) Ltd.
- Using two thermal switches to control a hybrid lamp13 May 2014US 8,723,430 B2General Electric Company
- Fluorescent lighting system1 May 2012US 8,167,676 B2VAXO Technologies, LLC
- Power supply for a field emission light source11 Dec 2014US 2014/0361700 A1Lightlab Sweden AB
- Gas Light System and Method6 Nov 2014US 2014/0327370 A1
- System and method for ignition and operation of a high intensity discharge lamp29 May 2014US 2014/0145642 A1Greentek Green Solutions (2009) Ltd.
- Using two thermal switches to control a hybrid lamp5 Sep 2013US 2013/0229118 A1General Electric Company
- UV sterilization system19 Apr 2012US 2012/0093684 A1
Most cited
By later US patents
- Power saving fluorescent lamp substitute94US 4,912,371 A1990
- Lamp driving topology74US 6,559,606 B1O2Micro International Limited · 2003
- Circuit for energizing cold-cathode fluorescent lamps63US 5,892,336 A1999
- Low pressure gas discharge lamp with increased end illumination57US 4,329,622 AXerox Corporation · 1982
- Ballast circuit for multiple parallel negative impedance loads52US 4,574,222 AGeneral Electric Company · 1986