H05B 41/16
In which the lamp is fed by dc or by low-frequency ac
Official title: in which the lamp is fed by DC or by low-frequency AC, e.g. by 50 cycles/sec AC {, or with network frequencies}
H05B41/16 (In which the lamp is fed by dc or by low-frequency ac) appears on 390 US grants and 97 published applications in this corpus.
Search patents in H05B- Granted patents
- 390
- Published applications
- 97
- Assignees
- 174
- Inventors
- 539
- Latest grant
- 13 May 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 8 | 0 |
| 1977 | 12 | 0 |
| 1978 | 9 | 0 |
| 1979 | 4 | 0 |
| 1980 | 10 | 0 |
| 1981 | 8 | 0 |
| 1982 | 16 | 0 |
| 1983 | 10 | 0 |
| 1984 | 14 | 0 |
| 1985 | 10 | 0 |
| 1986 | 11 | 0 |
| 1987 | 9 | 0 |
| 1988 | 12 | 0 |
| 1989 | 10 | 0 |
| 1990 | 14 | 0 |
| 1991 | 16 | 0 |
| 1992 | 18 | 0 |
| 1993 | 14 | 0 |
| 1994 | 10 | 0 |
| 1995 | 11 | 0 |
| 1996 | 6 | 0 |
| 1997 | 6 | 0 |
| 1998 | 14 | 0 |
| 1999 | 15 | 0 |
| 2000 | 9 | 0 |
| 2001 | 12 | 0 |
| 2002 | 6 | 8 |
| 2003 | 15 | 9 |
| 2004 | 7 | 7 |
| 2005 | 4 | 5 |
| 2006 | 4 | 1 |
| 2007 | 4 | 6 |
| 2008 | 2 | 2 |
| 2009 | 3 | 3 |
| 2010 | 3 | 5 |
| 2011 | 4 | 5 |
| 2012 | 2 | 8 |
| 2013 | 5 | 8 |
| 2014 | 8 | 11 |
| 2015 | 8 | 4 |
| 2016 | 10 | 2 |
| 2017 | 5 | 4 |
| 2018 | 4 | 0 |
| 2019 | 0 | 2 |
| 2020 | 2 | 1 |
| 2021 | 2 | 3 |
| 2022 | 1 | 0 |
| 2023 | 1 | 2 |
| 2024 | 1 | 1 |
| 2025 | 1 | 0 |
By publication year. Applications have been published since 2001.
Subgroups
Granted patents
Recent patents
- Asymmetrical ballast transformer13 May 2025US 12,302,486 B2Atmospheric Plasma Solutions, Inc.
- Magnetic induction circuit, magnetic-controlled switch circuit, circuit board, magnetic-controlled device, and magnetic-controlled lamp24 Dec 2024US 12,177,947 B2Shenzhen Above Lights Co., Ltd.
- Asymmetrical ballast transformer18 Jul 2023US 11,706,866 B2Atmospheric Plasma Solutions, Inc.
- Device with deuterium lamp and liquid chromatograph22 Nov 2022US 11,506,645 B2Shimadzu Corporation
- Asymmetrical ballast transformer25 May 2021US 11,019,713 B2Atmospheric Plasma Solutions, Inc.
- A device with customized integrated electronic circuit for destroying pathogens20 Jun 2024US 2024/0197936 A1
- Asymmetrical ballast transformer2 Nov 2023US 2023/0354500 A1Atmospheric Plasma Solutions, Inc.
- Magnetic induction circuit, magnetic-controlled switch circuit, circuit board, magnetic-controlled device, and magnetic-controlled lamp16 Feb 2023US 2023/0047388 A1Shenzhen Above Lights Co., Ltd.
- Asymmetrical ballast transformer2 Sep 2021US 2021/0274629 A1Atmospheric Plasma Solutions, Inc.
- Device with deuterium lamp and liquid chromatograph19 Aug 2021US 2021/0255154 A1Shimadzu Corporation
Most cited
By later US patents
- Motion sensing system with adaptive timing for controlling lighting fixtures298US 5,946,209 AHubbell Incorporated · 1999
- Motion sensing system with adaptive timing for controlling lighting fixtures273US 6,151,529 AHubbell Incorporated · 2000
- Three wire air gap off power supply circuit for operating switch and regulating current when switch or load is open252US 5,777,837 AHubbell Incorporated · 1998
- Radial waveguide systems and methods for post-match control of microwaves157US 9,299,537 B2APPLIED Materials.Inc. · 2016
- Radial waveguide systems and methods for post-match control of microwaves129US 9,564,296 B2APPLIED Materials.Inc. · 2017