F21V 23/02
The elements being transformers, impedances or power supply units
Official title: the elements being transformers, impedances {or power supply units, e.g. a transformer with a rectifier}
F21V23/02 (The elements being transformers, impedances or power supply units) appears on 2,561 US grants and 2,617 published applications in this corpus.
Search patents in F21V- Granted patents
- 2,561
- Published applications
- 2,617
- Assignees
- 1,162
- Inventors
- 4,206
- Latest grant
- 29 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 6 | 0 |
| 1977 | 5 | 0 |
| 1978 | 2 | 0 |
| 1979 | 2 | 0 |
| 1980 | 6 | 0 |
| 1981 | 4 | 0 |
| 1982 | 4 | 0 |
| 1983 | 12 | 0 |
| 1984 | 6 | 0 |
| 1985 | 12 | 0 |
| 1986 | 4 | 0 |
| 1987 | 7 | 0 |
| 1988 | 13 | 0 |
| 1989 | 12 | 0 |
| 1990 | 9 | 0 |
| 1991 | 13 | 0 |
| 1992 | 13 | 0 |
| 1993 | 16 | 0 |
| 1994 | 14 | 0 |
| 1995 | 27 | 0 |
| 1996 | 17 | 0 |
| 1997 | 14 | 0 |
| 1998 | 28 | 0 |
| 1999 | 14 | 0 |
| 2000 | 27 | 0 |
| 2001 | 31 | 12 |
| 2002 | 36 | 28 |
| 2003 | 38 | 35 |
| 2004 | 22 | 34 |
| 2005 | 32 | 37 |
| 2006 | 21 | 50 |
| 2007 | 30 | 62 |
| 2008 | 27 | 45 |
| 2009 | 42 | 64 |
| 2010 | 44 | 86 |
| 2011 | 51 | 81 |
| 2012 | 58 | 102 |
| 2013 | 82 | 119 |
| 2014 | 89 | 136 |
| 2015 | 100 | 176 |
| 2016 | 137 | 237 |
| 2017 | 205 | 245 |
| 2018 | 227 | 216 |
| 2019 | 239 | 219 |
| 2020 | 219 | 182 |
| 2021 | 153 | 104 |
| 2022 | 106 | 78 |
| 2023 | 72 | 53 |
| 2024 | 80 | 74 |
| 2025 | 79 | 78 |
| 2026 | 54 | 64 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
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- Mobility lighting apparatus and mobility device8 Sep 2026US 12,732,023 B2Hyundai Motor Company
- Composite printed circuit board apparatus8 Oct 2026US 2026/0309319 A1Whelen Engineering Company, Inc.
- Solid State Lamp Using Light Emitting Strips1 Oct 2026US 2026/0298419 A1Quarkstar LLC
- Integrated ceiling device with mechanical arrangement for a light source1 Oct 2026US 2026/0298440 A1Lighting Defense Group, LLC
- Supply device for fastening to a planar carrier arrangement having electrical conductor tracks24 Sep 2026US 2026/0287159 A1H4X e.U.
- Portable light10 Sep 2026US 2026/0266452 A1Milwaukee Electric Tool Corporation
Most cited
By later US patents
- Solid state lamp534US 4,211,955 A1980
- LED lamp with reflector and multicolor adjuster484US 6,149,283 ARensselaer Polytechnic Institute (RPI) · 2000
- Light emitting diode (LED) light bulbs440US 6,948,829 B2Dialight Corporation · 2005
- LED replacement for fluorescent lighting371US 6,860,628 B22005
- Inductively powered apparatus349US 7,126,450 B2Access Business Group International LLC · 2006