H05B 45/305
Frequency-control circuits
H05B45/305 (Frequency-control circuits) appears on 146 US grants and 152 published applications in this corpus.
Search patents in H05B- Granted patents
- 146
- Published applications
- 152
- Assignees
- 98
- Inventors
- 254
- Latest grant
- 29 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 1 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 1 | 0 |
| 1998 | 1 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 1 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 2 |
| 2004 | 0 | 1 |
| 2005 | 1 | 9 |
| 2006 | 2 | 2 |
| 2007 | 3 | 1 |
| 2008 | 4 | 2 |
| 2009 | 3 | 4 |
| 2010 | 2 | 3 |
| 2011 | 3 | 3 |
| 2012 | 2 | 4 |
| 2013 | 2 | 3 |
| 2014 | 3 | 4 |
| 2015 | 4 | 12 |
| 2016 | 6 | 4 |
| 2017 | 6 | 9 |
| 2018 | 11 | 5 |
| 2019 | 7 | 13 |
| 2020 | 16 | 9 |
| 2021 | 14 | 10 |
| 2022 | 9 | 10 |
| 2023 | 9 | 13 |
| 2024 | 10 | 13 |
| 2025 | 11 | 11 |
| 2026 | 13 | 5 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Driving system for a lighting apparatus29 Sep 2026US 12,750,933 B2Renesas Design (UK) Limited
- Multi-mode dimming and color temperature adjustment power supply based on PWM15 Sep 2026US 12,739,953 B2Zhuhai Shengchang Electronics Co., Ltd.
- Control circuit for controlling light emitting element1 Sep 2026US 12,727,067 B2ASMedia Technology Inc.
- Control a dimming level of an illumination load by a dimmer device28 Jul 2026US 12,696,364 B2Roku, Inc.
- Two-wire dimmer with improved zero-cross detention14 Jul 2026US 12,684,663 B2Lutron Technology Company LLC
- Multifunction portable illumination system24 Sep 2026US 2026/0287126 A1Immobileyes Inc.
- Brightness control method of light-emitting device and light-emitting module10 Sep 2026US 2026/0271146 A1Wuxi Indie Microelectronics Ltd.
- Control circuit for controlling light emitting element20 Aug 2026US 2026/0247507 A1ASMedia Technology Inc.
- Temporal variations in flux output23 Jul 2026US 2026/0209659 A1
- Multi-mode dimming and color temperature adjustment power supply based on pwm9 Jul 2026US 2026/0197911 A1Zhuhai Shengchang Electronics Co., Ltd.
Most cited
By later US patents
- LED power control methods and apparatus433US 7,256,554 B2Color Kinetics Incorporated · 2007
- LED-based lighting network power control methods and apparatus390US 7,233,115 B2Color Kinetics Incorporated · 2007
- Retrofit light emitting diode tube243US 6,936,968 B2Mule Lighting, Inc. · 2005
- Power factor correction control methods and apparatus240US 7,358,706 B2Philips Solid-State Lighting Solutions, Inc. · 2008
- LED power control methods and apparatus182US 7,557,521 B2Philips Solid-State Lighting Solutions, Inc. · 2009