F21L 4/02
Electric lighting devices with self-contained electric batteries or cells: characterised by the
Official title: characterised by the provision of two or more light sources
F21L4/02 (Electric lighting devices with self-contained electric batteries or cells: characterised by the) appears on 1,237 US grants and 1,392 published applications in this corpus.
Search patents in F21L- Granted patents
- 1,237
- Published applications
- 1,392
- Assignees
- 491
- Inventors
- 1,736
- Latest grant
- 29 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 2 | 0 |
| 1981 | 2 | 0 |
| 1982 | 2 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 2 | 0 |
| 1986 | 0 | 0 |
| 1987 | 3 | 0 |
| 1988 | 2 | 0 |
| 1989 | 1 | 0 |
| 1990 | 4 | 0 |
| 1991 | 5 | 0 |
| 1992 | 3 | 0 |
| 1993 | 3 | 0 |
| 1994 | 2 | 0 |
| 1995 | 7 | 0 |
| 1996 | 4 | 0 |
| 1997 | 7 | 0 |
| 1998 | 3 | 0 |
| 1999 | 7 | 0 |
| 2000 | 10 | 0 |
| 2001 | 14 | 11 |
| 2002 | 19 | 13 |
| 2003 | 25 | 39 |
| 2004 | 29 | 57 |
| 2005 | 40 | 84 |
| 2006 | 51 | 71 |
| 2007 | 39 | 56 |
| 2008 | 32 | 45 |
| 2009 | 35 | 80 |
| 2010 | 48 | 73 |
| 2011 | 40 | 60 |
| 2012 | 48 | 52 |
| 2013 | 50 | 72 |
| 2014 | 44 | 49 |
| 2015 | 74 | 58 |
| 2016 | 38 | 60 |
| 2017 | 64 | 78 |
| 2018 | 60 | 60 |
| 2019 | 78 | 53 |
| 2020 | 59 | 53 |
| 2021 | 50 | 59 |
| 2022 | 51 | 51 |
| 2023 | 50 | 53 |
| 2024 | 49 | 34 |
| 2025 | 50 | 46 |
| 2026 | 26 | 25 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Work light29 Sep 2026US 12,747,854 B2Milwaukee Electric Tool Corporation
- Scuba light with offset battery cases22 Sep 2026US 12,742,525 B1
- Portable charger for recreational flying objects and method of use22 Sep 2026US 12,742,526 B2
- Wearable illumination device15 Sep 2026US 12,736,191 B1
- Illumination and sound devices and systems for baby gear25 Aug 2026US 12,716,577 B2
- Portable lighting device with a flexible and deployable led lighting element8 Oct 2026US 2026/0309287 A1Promier Products Inc.
- Multifunction portable illumination system24 Sep 2026US 2026/0287126 A1Immobileyes Inc.
- Hazard light24 Sep 2026US 2026/0287127 A1Techtronic Cordless GP
- Portable illumination apparatus24 Sep 2026US 2026/0287128 A1
- Surgical eyewear lighting systems and methods3 Sep 2026US 2026/0256542 A1Hawkeye Surgical Lighting, Inc.
Most cited
By later US patents
- Preparedness flashlight1,025US 7,780,309 B2Eveready Battery Company, Inc. · 2010
- Method and apparatus for an L.E.D. flashlight530US 6,095,661 APPT Vision, Inc. · 2000
- High power LED305US 6,541,800 B2Weldon Technologies, Inc. · 2003
- LED illumination apparatus and card-type LED illumination source287US 6,949,772 B2Matsushita Electric Industrial Co., Ltd. · 2005
- Flashlight for covert applications247US 5,161,879 A1992