H05B 45/335
Pulse-frequency modulation [pfm]
Official title: Pulse-frequency modulation [PFM]
H05B45/335 (Pulse-frequency modulation [pfm]) appears on 74 US grants and 92 published applications in this corpus.
Search patents in H05B- Granted patents
- 74
- Published applications
- 92
- Assignees
- 62
- Inventors
- 163
- Latest grant
- 24 Mar 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1979 | 1 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 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 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 1 |
| 2005 | 1 | 3 |
| 2006 | 0 | 2 |
| 2007 | 1 | 2 |
| 2008 | 1 | 0 |
| 2009 | 0 | 5 |
| 2010 | 2 | 5 |
| 2011 | 2 | 3 |
| 2012 | 5 | 0 |
| 2013 | 3 | 2 |
| 2014 | 1 | 3 |
| 2015 | 2 | 1 |
| 2016 | 2 | 5 |
| 2017 | 2 | 2 |
| 2018 | 9 | 6 |
| 2019 | 4 | 4 |
| 2020 | 5 | 16 |
| 2021 | 7 | 2 |
| 2022 | 7 | 8 |
| 2023 | 5 | 7 |
| 2024 | 6 | 5 |
| 2025 | 6 | 8 |
| 2026 | 1 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Lighting circuit24 Mar 2026US 12,588,122 B2Signify Holding B. V.
- Retail weighing scale23 Dec 2025US 12,504,315 B2Bizerba GmbH & Co.KG
- Load control device for a light-emitting diode light source5 Aug 2025US 12,382,559 B2Lutron Technology Company LLC
- Three level switching converter and control29 Jul 2025US 12,376,211 B2Texas Instruments Incorporated
- Method and apparatus for stable battery-powered supply modules29 Apr 2025US 12,289,042 B2Avago Technologies International Sales Pte. Limited
- Method and illumination unit for illuminating a detection area of a code reader18 Jun 2026US 2026/0173234 A1VITRONIC Machine Vision GmbH
- Dimming power supply11 Jun 2026US 2026/0164517 A1Zhuhai Shengchang Electronics Co., Ltd.
- Light-emitting diode driving device and method for generating driving signal therefor18 Dec 2025US 2025/0386408 A1Global Technologies, Inc.
- Load Control Device for a Light-Emitting Diode Light Source20 Nov 2025US 2025/0358913 A1Lutron Technology Company LLC
- Three level switching converter and control20 Nov 2025US 2025/0358914 A1Texas Instruments Incorporated
Most cited
By later US patents
- Lighting methods and systems641US 7,178,941 B2Color Kinetics Incorporated · 2007
- Method and apparatus for illumination and communication142US 7,689,130 B2Koninklijke Philips Electronics N. V. · 2010
- Lighting methods and systems134US 8,207,821 B2Philips Solid-State Lighting Solutions, Inc. · 2012
- Switching device for driving LED array by pulse-shaped current modulation48US 7,463,070 B2Koninklijke Philips Electronics N. V. · 2008
- Bias power regulator circuit for isolated converters with a wide output voltage range43US 11,955,896 B2Texas Instruments Incorporated · 2024