H05B 41/14
Circuit arrangements
H05B41/14 (Circuit arrangements) appears on 7,595 US grants and 4,872 published applications in this corpus.
Search patents in H05B- Granted patents
- 7,595
- Published applications
- 4,872
- Assignees
- 1,887
- Inventors
- 8,068
- Latest grant
- 15 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 60 | 0 |
| 1977 | 72 | 0 |
| 1978 | 75 | 0 |
| 1979 | 49 | 0 |
| 1980 | 68 | 0 |
| 1981 | 69 | 0 |
| 1982 | 63 | 0 |
| 1983 | 80 | 0 |
| 1984 | 82 | 0 |
| 1985 | 78 | 0 |
| 1986 | 75 | 0 |
| 1987 | 85 | 0 |
| 1988 | 73 | 0 |
| 1989 | 76 | 0 |
| 1990 | 135 | 0 |
| 1991 | 184 | 0 |
| 1992 | 152 | 0 |
| 1993 | 120 | 0 |
| 1994 | 123 | 0 |
| 1995 | 178 | 0 |
| 1996 | 172 | 0 |
| 1997 | 142 | 0 |
| 1998 | 229 | 0 |
| 1999 | 257 | 0 |
| 2000 | 282 | 0 |
| 2001 | 258 | 36 |
| 2002 | 249 | 274 |
| 2003 | 276 | 267 |
| 2004 | 264 | 306 |
| 2005 | 219 | 402 |
| 2006 | 283 | 417 |
| 2007 | 328 | 414 |
| 2008 | 317 | 444 |
| 2009 | 263 | 463 |
| 2010 | 285 | 443 |
| 2011 | 333 | 265 |
| 2012 | 351 | 224 |
| 2013 | 259 | 184 |
| 2014 | 206 | 171 |
| 2015 | 162 | 122 |
| 2016 | 143 | 87 |
| 2017 | 93 | 79 |
| 2018 | 87 | 56 |
| 2019 | 70 | 54 |
| 2020 | 49 | 43 |
| 2021 | 26 | 31 |
| 2022 | 28 | 29 |
| 2023 | 28 | 28 |
| 2024 | 18 | 12 |
| 2025 | 13 | 12 |
| 2026 | 8 | 9 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- H05B 41/26In which the lamp is fed by power derived from dc by4,911
- H05B 41/36Controlling2,941
- H05B 41/30In which the lamp is fed by pulses745
- H05B 41/24In which the lamp is fed by high frequency ac , or467
- H05B 41/16In which the lamp is fed by dc or by low-frequency ac390
- H05B 41/46Circuits providing for substitution in case of failure of the lamp81
Recent patents
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Most cited
By later US patents
- Inverter992US 8,044,604 B2Rohm Co., Ltd. · 2011
- High frequency inverter with power-line-controlled frequency modulation615US 5,404,082 ANorth American Philips Corporation · 1995
- Universal ballast control circuit611US 6,137,240 ALumion Corporation · 2000
- Method to operate an incoherently emitting radiation source having at least one dielectrically impeded electrode583US 5,604,410 APatent-Treuhand-Gesellschaft fur elektrische Gluhlampen mbH · 1997
- Electronic ballast system528US 4,414,492 AIntent Patent A.G. · 1983