H05B 47/21
Of two or more light sources connected in parallel
Official title: of two or more light sources connected in parallel
H05B47/21 (Of two or more light sources connected in parallel) appears on 335 US grants and 356 published applications in this corpus.
Search patents in H05B- Granted patents
- 335
- Published applications
- 356
- Assignees
- 246
- Inventors
- 737
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1980 | 1 | 0 |
| 1981 | 0 | 0 |
| 1982 | 2 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 1 | 0 |
| 1987 | 1 | 0 |
| 1988 | 2 | 0 |
| 1989 | 1 | 0 |
| 1990 | 1 | 0 |
| 1991 | 0 | 0 |
| 1992 | 2 | 0 |
| 1993 | 2 | 0 |
| 1994 | 2 | 0 |
| 1995 | 4 | 0 |
| 1996 | 2 | 0 |
| 1997 | 1 | 0 |
| 1998 | 5 | 0 |
| 1999 | 1 | 0 |
| 2000 | 5 | 0 |
| 2001 | 3 | 1 |
| 2002 | 12 | 10 |
| 2003 | 5 | 6 |
| 2004 | 9 | 11 |
| 2005 | 7 | 9 |
| 2006 | 6 | 6 |
| 2007 | 4 | 15 |
| 2008 | 6 | 15 |
| 2009 | 10 | 14 |
| 2010 | 7 | 16 |
| 2011 | 10 | 11 |
| 2012 | 14 | 12 |
| 2013 | 15 | 29 |
| 2014 | 15 | 17 |
| 2015 | 15 | 17 |
| 2016 | 15 | 21 |
| 2017 | 23 | 21 |
| 2018 | 16 | 18 |
| 2019 | 18 | 15 |
| 2020 | 17 | 24 |
| 2021 | 15 | 16 |
| 2022 | 19 | 10 |
| 2023 | 10 | 21 |
| 2024 | 12 | 13 |
| 2025 | 13 | 4 |
| 2026 | 6 | 4 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Illumination device and method for calibrating an illumination device over changes in temperature, drive current, and time6 Oct 2026US 12,757,304 B2Lutron Technology Company LLC
- Bidirectional illuminated LED bead triggered by power line pulse signals25 Aug 2026US 12,720,654 B2Hangzhou Yun Led Chip Photoelectricity Tech. Co., Ltd.
- Multi-function active accessories for LED lamps9 Jun 2026US 12,650,215 B2Korrus, Inc.
- Lamp monitoring and control system and method26 May 2026US 12,641,701 B2Smartcap Innovations, LLC
- Centralized light supply apparatus12 May 2026US 12,628,260 B2Zte Corporation
- Multi-channel light-emitting diode constant-current-and-light power driving circuit and electronic device9 Jul 2026US 2026/0197916 A1Guangzhou Supu Software Technology Co., Ltd.
- Airfield Ground Light with Integrated Light Controller That Employs Powerline Communications and Sensors11 Jun 2026US 2026/0164523 A1ADB Safegae BV
- Addressable lighting fault detection5 Mar 2026US 2026/0068017 A1Axis Innovations, LLC
- Lighting control device with air gap switch controlled output19 Feb 2026US 2026/0052617 A1Signify Holding B. V.
- System and method for railroad smart flasher lamps20 Nov 2025US 2025/0358915 A1BNSF Railway Company
Most cited
By later US patents
- Power/energy management control system331US 6,528,957 B1Lutron Electronics Co., Inc. · 2003
- System for monitoring the light level around an ATM276US 6,028,522 AStatSignal Systems, Inc. · 2000
- Monitoring and alerting system for buildings212US 6,121,875 AInform 2000 · 2000
- Intelligent lamp or intelligent contact terminal for a lamp171US 5,592,051 A1997
- Lamp monitoring and control system and method128US 6,035,266 AA. L. Air Data, Inc. · 2000