H05B 47/29
Circuits providing for substitution of the light source in case of its
Official title: Circuits providing for substitution of the light source in case of its failure
H05B47/29 (Circuits providing for substitution of the light source in case of its) appears on 95 US grants and 92 published applications in this corpus.
Search patents in H05B- Granted patents
- 95
- Published applications
- 92
- Assignees
- 69
- Inventors
- 204
- Latest grant
- 15 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 2 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 2 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 1 | 0 |
| 1989 | 2 | 0 |
| 1990 | 1 | 0 |
| 1991 | 1 | 0 |
| 1992 | 2 | 0 |
| 1993 | 1 | 0 |
| 1994 | 1 | 0 |
| 1995 | 2 | 0 |
| 1996 | 0 | 0 |
| 1997 | 1 | 0 |
| 1998 | 0 | 0 |
| 1999 | 1 | 0 |
| 2000 | 1 | 0 |
| 2001 | 0 | 0 |
| 2002 | 1 | 1 |
| 2003 | 0 | 1 |
| 2004 | 0 | 1 |
| 2005 | 1 | 1 |
| 2006 | 0 | 1 |
| 2007 | 1 | 0 |
| 2008 | 0 | 4 |
| 2009 | 1 | 6 |
| 2010 | 3 | 1 |
| 2011 | 2 | 4 |
| 2012 | 4 | 4 |
| 2013 | 1 | 2 |
| 2014 | 3 | 5 |
| 2015 | 2 | 8 |
| 2016 | 13 | 13 |
| 2017 | 9 | 7 |
| 2018 | 5 | 7 |
| 2019 | 6 | 3 |
| 2020 | 6 | 7 |
| 2021 | 4 | 1 |
| 2022 | 4 | 6 |
| 2023 | 6 | 4 |
| 2024 | 1 | 1 |
| 2025 | 2 | 1 |
| 2026 | 2 | 3 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Light tube circuit for switching between emergency lighting and general lighting15 Sep 2026US 12,739,959 B2Shenzhen Billda Technology Co., Ltd
- Floor lamp control circuit13 Jan 2026US 12,526,890 B2
- Systems and methods for mitigating micro-LED failures21 Oct 2025US 12,451,056 B2Apple Inc.
- System for checking a luminaire status and method thereof26 Aug 2025US 12,402,233 B2Schreder S.A.
- Failure modeling and management of an aerial light fixture17 Sep 2024US 12,096,538 B2
- Vehicle system redundancy30 Apr 2026US 2026/0116294 A1
- Lighting control system for mitigating exterior light failures30 Apr 2026US 2026/0116295 A1GM Global Technology Operations LLC
- Light tube circuit for switching between emergency lighting and general lighting12 Feb 2026US 2026/0046992 A1Shenzhen Billda Technology Co., Ltd
- Systems and Methods for Mitigating Micro-LED Failures11 Sep 2025US 2025/0285578 A1Apple Inc.
- Floor Lamp Control Circuit12 Dec 2024US 2024/0414821 A1
Most cited
By later US patents
- Resetting an electronic ballast in the event of fault525US 8,004,198 B2Osram Sylvania Inc. · 2011
- LED lighting unit98US 7,607,798 B2Avago Technologies General IP (Singapore) Pte. Ltd. · 2009
- Emergency lighting system81US 5,365,145 AGael, Inc. · 1994
- Operating circuit for high-pressure discharge lamps with an ignition-time bridging function63US 5,917,287 APatent-Treuhand-Gesellschaft fuer elektrische Gluehlampen mbH · 1999
- Flat panel lighting device and retrofit kit48US 8,915,636 B2PIXI Lighting, Inc. · 2014