H05B 41/234
To eliminate stroboscopic effects
Official title: to eliminate stroboscopic effects, e.g. feeding two lamps with different phases
H05B41/234 (To eliminate stroboscopic effects) appears on 5 US grants and 3 published applications in this corpus.
Search patents in H05B- Granted patents
- 5
- Published applications
- 3
- Assignees
- 4
- Inventors
- 8
- Latest grant
- 11 Aug 2009
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1995 | 1 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 1 | 1 |
| 2003 | 1 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 1 |
| 2006 | 1 | 0 |
| 2007 | 0 | 1 |
| 2008 | 0 | 0 |
| 2009 | 1 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Perceptible flickering reduction11 Aug 2009US 7,573,206 B2Hewlett-Packard Development Company, L. P.
- Illuminator28 Feb 2006US 7,005,803 B2Digital Alliance Co., Ltd.
- Discharge lamp lighting circuit9 Sep 2003US 6,617,809 B2Koito Manufacturing Co., Ltd.
- Multiple lamp ballast system12 Feb 2002US 6,346,782 B1Genlyte Thomas Group LLC
- Circuitry for operating fluorescent lamps with no stroboscopic effects18 Jul 1995US 5,434,476 A
Most cited
By later US patents
- Multiple lamp ballast system5US 6,346,782 B1Genlyte Thomas Group LLC · 2002
- Circuitry for operating fluorescent lamps with no stroboscopic effects4US 5,434,476 A1995
- Discharge lamp lighting circuit2US 6,617,809 B2Koito Manufacturing Co., Ltd. · 2003
- Perceptible flickering reduction2US 7,573,206 B2Hewlett-Packard Development Company, L. P. · 2009
- Illuminator1US 7,005,803 B2Digital Alliance Co., Ltd. · 2006