F21V 21/13
Spring-loaded poles fixed at both ends
F21V21/13 (Spring-loaded poles fixed at both ends) appears on 22 US grants and 18 published applications in this corpus.
Search patents in F21V- Granted patents
- 22
- Published applications
- 18
- Assignees
- 15
- Inventors
- 43
- Latest grant
- 23 Dec 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 1 | 0 |
| 1989 | 1 | 0 |
| 1990 | 0 | 0 |
| 1991 | 1 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 1 | 0 |
| 1995 | 1 | 0 |
| 1996 | 0 | 0 |
| 1997 | 2 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 1 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 1 | 0 |
| 2008 | 0 | 2 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 1 |
| 2013 | 0 | 1 |
| 2014 | 1 | 0 |
| 2015 | 0 | 2 |
| 2016 | 0 | 0 |
| 2017 | 2 | 1 |
| 2018 | 1 | 1 |
| 2019 | 0 | 1 |
| 2020 | 2 | 0 |
| 2021 | 0 | 1 |
| 2022 | 1 | 3 |
| 2023 | 2 | 1 |
| 2024 | 2 | 1 |
| 2025 | 1 | 1 |
| 2026 | 0 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Retention, adjustability and maintenance for a recessed component such as a recessed luminaire23 Dec 2025US 12,504,136 B2Lucifer Lighting Company
- Retention, adjustability and maintenance for a recessed component such as a recessed luminaire24 Dec 2024US 12,173,864 B2Lucifer Lighting Company
- Device for compensating cut-off line drift of a lamp, lamp comprising the device and vehicle comprising the lamp5 Nov 2024US 12,134,343 B2Hella GmbH & Co. KGaA
- Retention, adjustability and maintenance for a recessed component such as a recessed luminaire12 Sep 2023US 11,754,237 B2Lucifer Lighting Company
- Built-in light and/or camera3 Jan 2023US 11,543,106 B2Herbert Waldmann GmbH & Co. KG
- Wall Wash Light Assembly5 Mar 2026US 2026/0063258 A1Lucifer Lighting Company
- Retention, Adjustability And Maintenance For A Recessed Component Such As A Recessed Luminaire27 Feb 2025US 2025/0067408 A1Lucifer Lighting Company
- Device for compensating cut-off line drift of a lamp, lamp comprising the device and vehicle comprising the lamp14 Mar 2024US 2024/0083341 A1Hella GmbH & Co. KGaA
- Retention, Adjustability And Maintenance For A Recessed Component Such As A Recessed Luminaire14 Sep 2023US 2023/0288035 A1Lucifer Lighting Company
- Retention, Adjustability And Maintenance For A Recessed Component Such As A Recessed Luminaire15 Dec 2022US 2022/0397249 A1Lucifer Lighting Company
Most cited
By later US patents
- Artificial Christmas tree103US 3,985,924 AThe Raymond Lee Organization, Inc. · 1976
- Tubular lighting system49US 4,751,627 A1988
- Lamp swivel42US 4,492,488 AI. W. Industries, Inc. · 1985
- Display lighting fixture and method of using same29US 5,437,504 A1995
- Display lighting fixture and method of using same21US 5,607,225 A1997