F21V 29/504
Of refractors
Official title: of refractors
F21V29/504 (Of refractors) appears on 44 US grants and 48 published applications in this corpus.
Search patents in F21V- Granted patents
- 44
- Published applications
- 48
- Assignees
- 34
- Inventors
- 99
- Latest grant
- 18 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1988 | 1 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 3 |
| 2007 | 0 | 0 |
| 2008 | 2 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 1 |
| 2012 | 0 | 6 |
| 2013 | 2 | 2 |
| 2014 | 4 | 3 |
| 2015 | 3 | 4 |
| 2016 | 3 | 2 |
| 2017 | 3 | 5 |
| 2018 | 1 | 8 |
| 2019 | 10 | 5 |
| 2020 | 3 | 1 |
| 2021 | 2 | 1 |
| 2022 | 1 | 0 |
| 2023 | 1 | 2 |
| 2024 | 4 | 2 |
| 2025 | 3 | 2 |
| 2026 | 1 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Light adjustment device, photography light, and photography system18 Aug 2026US 12,710,170 B2Shenzhen Leqi Innovation Co., Ltd.
- Light source30 Dec 2025US 12,510,229 B2Crytur, Spol.S R.O.
- Illumination device30 Sep 2025US 12,429,191 B2Schott AG
- Light head with auxiliary heat dissipation and stage light fixture having same3 Jun 2025US 12,320,513 B2Guangzhou Haoyang Electronic Co., Ltd.
- Floodlight1 Oct 2024US 12,104,769 B1Shenzhen Huadian Lighting Co., Ltd.
- Outgassing filtering system for a luminaire4 Jun 2026US 2026/0153233 A1Robe Lighting s.r.o.
- Light adjustment device, photography light, and photography system6 Nov 2025US 2025/0341304 A1Shenzhen Leqi Innovation Co., Ltd.
- Light head with auxiliary heat dissipation and stage light fixture having same2 Jan 2025US 2025/0003582 A1Guangzhou Haoyang Electronic Co., Ltd.
- Optical arrangement for collimated light beam23 May 2024US 2024/0167664 A1Ozyegin Universitesi
- Illumination device14 Mar 2024US 2024/0084998 A1Schott AG
Most cited
By later US patents
- Lens frame with a LED support surface and heat dissipating structure59US 8,506,127 B2Koninklijke Philips N. V. · 2013
- Controllable lighting system23US 9,433,051 B2Koninklijke Philips N. V. · 2016
- Retroreflective, multi-element design for a solid state directional lamp18US 8,777,455 B2Cree, Inc. · 2014
- Indoor light fixture for high intensity lamp13US 4,768,140 A1988
- Lens optics used to reduce part deformation due to heat5US 7,399,106 B2Toyota Motor Engineering & Manufacturing North America, Inc. · 2008