H05B 41/26
In which the lamp is fed by power derived from dc by
Official title: in which the lamp is fed by power derived from DC by means of a converter, e.g. by high-voltage DC
H05B41/26 (In which the lamp is fed by power derived from dc by) appears on 4,911 US grants and 3,535 published applications in this corpus.
Search patents in H05B- Granted patents
- 4,911
- Published applications
- 3,535
- Assignees
- 1,176
- Inventors
- 5,036
- Latest grant
- 14 Jul 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 5 | 0 |
| 1977 | 14 | 0 |
| 1978 | 14 | 0 |
| 1979 | 10 | 0 |
| 1980 | 13 | 0 |
| 1981 | 19 | 0 |
| 1982 | 14 | 0 |
| 1983 | 24 | 0 |
| 1984 | 28 | 0 |
| 1985 | 31 | 0 |
| 1986 | 25 | 0 |
| 1987 | 49 | 0 |
| 1988 | 27 | 0 |
| 1989 | 37 | 0 |
| 1990 | 69 | 0 |
| 1991 | 104 | 0 |
| 1992 | 85 | 0 |
| 1993 | 65 | 0 |
| 1994 | 77 | 0 |
| 1995 | 128 | 0 |
| 1996 | 118 | 0 |
| 1997 | 95 | 0 |
| 1998 | 151 | 0 |
| 1999 | 182 | 0 |
| 2000 | 198 | 0 |
| 2001 | 180 | 27 |
| 2002 | 179 | 194 |
| 2003 | 189 | 191 |
| 2004 | 180 | 243 |
| 2005 | 176 | 309 |
| 2006 | 226 | 364 |
| 2007 | 273 | 341 |
| 2008 | 270 | 352 |
| 2009 | 213 | 366 |
| 2010 | 218 | 334 |
| 2011 | 271 | 194 |
| 2012 | 273 | 155 |
| 2013 | 189 | 124 |
| 2014 | 148 | 115 |
| 2015 | 101 | 63 |
| 2016 | 78 | 39 |
| 2017 | 49 | 33 |
| 2018 | 45 | 25 |
| 2019 | 23 | 16 |
| 2020 | 16 | 10 |
| 2021 | 4 | 6 |
| 2022 | 6 | 8 |
| 2023 | 8 | 16 |
| 2024 | 7 | 5 |
| 2025 | 4 | 3 |
| 2026 | 3 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Methods and systems of driving arrays of diodes14 Jul 2026US 12,683,357 B2Semiconductor Components Industries, LLC
- Method for operating a discharge lamp and discharge lamp9 Jun 2026US 12,650,637 B2OSRAM GmbH
- Lamp monitoring and control system and method26 May 2026US 12,641,701 B2Smartcap Innovations, LLC
- Light source device, dielectric barrier discharge lamp lighting circuit, dielectric barrier discharge lamp lighting method8 Jul 2025US 12,356,517 B2Ushio Denki Kabushiki Kaisha
- Liquid, air, and surface treatment using high intensity broad-spectrum pulsed light and method using the same27 May 2025US 12,311,067 B2Aruna Inovation LLC
- Power supply circuit and lamp10 Sep 2026US 2026/0271145 A1Filament Lighting LLC
- Method and apparatus for light generation29 Jan 2026US 2026/0031316 A1Excelitas Technologies Corp.
- Lamp lighting device, fluorescence detector and chromatograph30 Oct 2025US 2025/0334520 A1Shimadzu Corporation
- Inductively Coupled Plasma Light Source with Switched Power Supply13 Feb 2025US 2025/0056705 A1Energetiq Technology, Inc.
- Circuit for conduction testing of power supply of plasma globe lamp6 Feb 2025US 2025/0044372 A1Changzhou Shengdan Electrical Equipment Co., Ltd.
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