H05B 47/23
Of two or more light sources connected in series
Official title: of two or more light sources connected in series
H05B47/23 (Of two or more light sources connected in series) appears on 173 US grants and 195 published applications in this corpus.
Search patents in H05B- Granted patents
- 173
- Published applications
- 195
- Assignees
- 113
- Inventors
- 338
- Latest grant
- 13 Jan 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1980 | 1 | 0 |
| 1981 | 2 | 0 |
| 1982 | 2 | 0 |
| 1983 | 1 | 0 |
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 1 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 2 | 0 |
| 1991 | 1 | 0 |
| 1992 | 3 | 0 |
| 1993 | 1 | 0 |
| 1994 | 1 | 0 |
| 1995 | 2 | 0 |
| 1996 | 0 | 0 |
| 1997 | 4 | 0 |
| 1998 | 0 | 0 |
| 1999 | 5 | 0 |
| 2000 | 5 | 0 |
| 2001 | 0 | 2 |
| 2002 | 7 | 10 |
| 2003 | 7 | 4 |
| 2004 | 3 | 5 |
| 2005 | 1 | 11 |
| 2006 | 4 | 10 |
| 2007 | 9 | 11 |
| 2008 | 5 | 11 |
| 2009 | 3 | 14 |
| 2010 | 7 | 6 |
| 2011 | 2 | 7 |
| 2012 | 5 | 5 |
| 2013 | 3 | 8 |
| 2014 | 6 | 12 |
| 2015 | 5 | 6 |
| 2016 | 8 | 7 |
| 2017 | 9 | 5 |
| 2018 | 7 | 11 |
| 2019 | 8 | 11 |
| 2020 | 14 | 14 |
| 2021 | 6 | 6 |
| 2022 | 9 | 6 |
| 2023 | 4 | 4 |
| 2024 | 3 | 3 |
| 2025 | 5 | 1 |
| 2026 | 1 | 5 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Light-emitting diode lighting device with afterglow-proof function13 Jan 2026US 12,526,895 B2Xiamen PVTECH Co., Ltd.
- Short-circuit fault-detecting lighting device for a motor vehicle9 Dec 2025US 12,491,818 B2ZKW Group GmbH
- Lighting device for a motor vehicle28 Oct 2025US 12,454,213 B2Bayerische Motoren Werke Aktiengesellschaft
- System for checking a luminaire status and method thereof26 Aug 2025US 12,402,233 B2Schreder S.A.
- Automated testing of emergency lights15 Apr 2025US 12,277,854 B2Hexmodal Technologies LLC
- Current sink with bypass for an led chain27 Aug 2026US 2026/0255455 A1Diehl Aerospace GmbH
- Current sink with parallel load for an led chain27 Aug 2026US 2026/0255457 A1Diehl Aerospace GmbH
- Airfield Ground Light with Integrated Light Controller That Employs Powerline Communications and Sensors11 Jun 2026US 2026/0164523 A1ADB Safegae BV
- Led short detection circuit and led system including the same30 Apr 2026US 2026/0122744 A1Samsung Electro-Mechanics Co., Ltd.
- Control circuit for a lighting device, lighting device including the control circuit, and control apparatus including the control circuit for a lighting device16 Apr 2026US 2026/0107361 A1TAE DAE Co., Ltd.
Most cited
By later US patents
- Lighting control system having temperature compensation and trim circuits80US 7,701,151 B2American Sterilizer Company · 2010
- Series connected light string with filament shunting70US 6,580,182 B2JLJ, Inc. · 2003
- LED array having an active shunt arrangement64US 6,153,980 APhilips Electronics North America Corporation · 2000
- Programmable string of lights59US 6,367,952 B1Ventur Research & Development Corp. · 2002
- Monitoring device for airfield lighting system53US 4,675,574 An.v. ADB s.a. · 1987