F21L 4/04
Electric lighting devices with self-contained electric batteries or cells: characterised by the
Official title: characterised by the provision of a light source housing portion adjustably fixed to the remainder of the device
F21L4/04 (Electric lighting devices with self-contained electric batteries or cells: characterised by the) appears on 587 US grants and 588 published applications in this corpus.
Search patents in F21L- Granted patents
- 587
- Published applications
- 588
- Assignees
- 243
- Inventors
- 888
- Latest grant
- 15 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 0 | 0 |
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 1 | 0 |
| 1983 | 1 | 0 |
| 1984 | 3 | 0 |
| 1985 | 4 | 0 |
| 1986 | 2 | 0 |
| 1987 | 1 | 0 |
| 1988 | 1 | 0 |
| 1989 | 1 | 0 |
| 1990 | 4 | 0 |
| 1991 | 2 | 0 |
| 1992 | 4 | 0 |
| 1993 | 5 | 0 |
| 1994 | 4 | 0 |
| 1995 | 3 | 0 |
| 1996 | 9 | 0 |
| 1997 | 4 | 0 |
| 1998 | 4 | 0 |
| 1999 | 5 | 0 |
| 2000 | 4 | 0 |
| 2001 | 4 | 1 |
| 2002 | 3 | 5 |
| 2003 | 6 | 3 |
| 2004 | 4 | 8 |
| 2005 | 11 | 19 |
| 2006 | 10 | 22 |
| 2007 | 9 | 24 |
| 2008 | 15 | 17 |
| 2009 | 15 | 20 |
| 2010 | 19 | 23 |
| 2011 | 12 | 16 |
| 2012 | 15 | 19 |
| 2013 | 18 | 23 |
| 2014 | 18 | 19 |
| 2015 | 21 | 26 |
| 2016 | 20 | 31 |
| 2017 | 26 | 23 |
| 2018 | 24 | 25 |
| 2019 | 36 | 36 |
| 2020 | 36 | 30 |
| 2021 | 30 | 30 |
| 2022 | 36 | 37 |
| 2023 | 38 | 40 |
| 2024 | 41 | 32 |
| 2025 | 35 | 37 |
| 2026 | 20 | 22 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Lighting device15 Sep 2026US 12,736,202 B2Japan Display Inc.
- Voice-controlled rechargeable portable outdoor light8 Sep 2026US 12,733,077 B1Beijing Huitong Hi-Tech Technology Co., Ltd.
- Storage unit with light-emitting components4 Aug 2026US 12,698,894 B2Milwaukee Electric Tool Corporation
- Lighting apparatus21 Jul 2026US 12,685,609 B2Ronin Surgical Corp.
- Portable flashlight21 Jul 2026US 12,687,282 B2Black & Decker Inc.
- Handheld lighting device and related methods1 Oct 2026US 2026/0298455 A1Harbor Freight Tools USA, Inc.
- Personal signaling device1 Oct 2026US 2026/0301550 A1S&S Precision, LLC
- Hazard light24 Sep 2026US 2026/0287127 A1Techtronic Cordless GP
- Portable illumination apparatus24 Sep 2026US 2026/0287128 A1
- Portable light10 Sep 2026US 2026/0266452 A1Milwaukee Electric Tool Corporation
Most cited
By later US patents
- Flashlight with flexible extension166US 5,154,483 A1992
- Flashlight with flexible core153US 5,521,803 A1996
- LED work light150US 6,857,756 B2General Manufacturing, Inc. · 2005
- Radiant-energy tool with flexible extension146US 5,369,556 A1994
- Flashlight with rotatable lamp head128US 5,871,272 AStreamlight, Inc. · 1999