F21L 4/08
Electric lighting devices with self-contained electric batteries or cells: characterised by means
Official title: characterised by means for in situ recharging of the batteries or cells
F21L4/08 (Electric lighting devices with self-contained electric batteries or cells: characterised by means) appears on 812 US grants and 912 published applications in this corpus.
Search patents in F21L- Granted patents
- 812
- Published applications
- 912
- Assignees
- 370
- Inventors
- 1,248
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 4 | 0 |
| 1978 | 4 | 0 |
| 1979 | 1 | 0 |
| 1980 | 2 | 0 |
| 1981 | 3 | 0 |
| 1982 | 5 | 0 |
| 1983 | 4 | 0 |
| 1984 | 3 | 0 |
| 1985 | 4 | 0 |
| 1986 | 6 | 0 |
| 1987 | 5 | 0 |
| 1988 | 4 | 0 |
| 1989 | 4 | 0 |
| 1990 | 3 | 0 |
| 1991 | 4 | 0 |
| 1992 | 4 | 0 |
| 1993 | 4 | 0 |
| 1994 | 4 | 0 |
| 1995 | 5 | 0 |
| 1996 | 5 | 0 |
| 1997 | 5 | 0 |
| 1998 | 6 | 0 |
| 1999 | 2 | 0 |
| 2000 | 5 | 0 |
| 2001 | 11 | 5 |
| 2002 | 6 | 7 |
| 2003 | 11 | 12 |
| 2004 | 5 | 9 |
| 2005 | 7 | 26 |
| 2006 | 12 | 32 |
| 2007 | 10 | 19 |
| 2008 | 16 | 24 |
| 2009 | 12 | 18 |
| 2010 | 17 | 30 |
| 2011 | 15 | 26 |
| 2012 | 15 | 28 |
| 2013 | 24 | 43 |
| 2014 | 30 | 40 |
| 2015 | 35 | 59 |
| 2016 | 34 | 52 |
| 2017 | 33 | 45 |
| 2018 | 57 | 82 |
| 2019 | 57 | 60 |
| 2020 | 52 | 52 |
| 2021 | 34 | 35 |
| 2022 | 44 | 49 |
| 2023 | 46 | 42 |
| 2024 | 53 | 44 |
| 2025 | 42 | 47 |
| 2026 | 35 | 26 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Caulk nozzle lighting system6 Oct 2026US 12,752,298 B2
- Device for increasing visibility of guy lines at night22 Sep 2026US 12,742,539 B2Brightz, Ltd.
- Handheld flashlight22 Sep 2026US 12,742,543 B2Shenzen Chifrog Technology Co., Ltd.
- Wearable illumination device15 Sep 2026US 12,736,191 B1
- Rechargeable LED lamp with magnetic base8 Sep 2026US 12,729,842 B1The Lamps Factory(Hk) Limited
- Portable lighting device with a flexible and deployable led lighting element8 Oct 2026US 2026/0309287 A1Promier Products Inc.
- Portable illumination apparatus24 Sep 2026US 2026/0287128 A1
- Method, system, and apparatus for illuminating designer smart accessories24 Sep 2026US 2026/0287166 A1Asher Levine Inc.
- Archery bow sight light10 Sep 2026US 2026/0266581 A1H.I.T. Outdoors, LLC
- Additive and integrated lighting and camera accessories for a hydraulic jack3 Sep 2026US 2026/0258939 A1Harbor Freight Tools USA, Inc.
Most cited
By later US patents
- Light emitting diode based products315US 7,161,313 B2Color Kinetics Incorporated · 2007
- Variable light beam flashlight and recharging unit184US 4,388,673 AMag Instrument, Inc. · 1983
- LED work light150US 6,857,756 B2General Manufacturing, Inc. · 2005
- Energizer apparatus for rechargeable flashlight batteries135US 4,092,580 A1978
- Flashlight with rotatable lamp head128US 5,871,272 AStreamlight, Inc. · 1999