G03B 21/20
Lamp housings
G03B21/20 (Lamp housings) appears on 6,032 US grants and 7,539 published applications in this corpus.
Search patents in G03B- Granted patents
- 6,032
- Published applications
- 7,539
- Assignees
- 1,060
- Inventors
- 7,023
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 5 | 0 |
| 1978 | 5 | 0 |
| 1979 | 2 | 0 |
| 1980 | 2 | 0 |
| 1981 | 1 | 0 |
| 1982 | 1 | 0 |
| 1983 | 9 | 0 |
| 1984 | 4 | 0 |
| 1985 | 3 | 0 |
| 1986 | 3 | 0 |
| 1987 | 0 | 0 |
| 1988 | 3 | 0 |
| 1989 | 0 | 0 |
| 1990 | 6 | 0 |
| 1991 | 6 | 0 |
| 1992 | 3 | 0 |
| 1993 | 7 | 0 |
| 1994 | 7 | 0 |
| 1995 | 5 | 0 |
| 1996 | 7 | 0 |
| 1997 | 14 | 0 |
| 1998 | 19 | 0 |
| 1999 | 18 | 0 |
| 2000 | 22 | 0 |
| 2001 | 38 | 17 |
| 2002 | 43 | 42 |
| 2003 | 39 | 39 |
| 2004 | 47 | 95 |
| 2005 | 57 | 177 |
| 2006 | 106 | 293 |
| 2007 | 134 | 275 |
| 2008 | 150 | 207 |
| 2009 | 127 | 216 |
| 2010 | 141 | 226 |
| 2011 | 186 | 243 |
| 2012 | 145 | 309 |
| 2013 | 208 | 397 |
| 2014 | 263 | 354 |
| 2015 | 342 | 381 |
| 2016 | 378 | 362 |
| 2017 | 367 | 362 |
| 2018 | 403 | 441 |
| 2019 | 428 | 581 |
| 2020 | 482 | 509 |
| 2021 | 413 | 456 |
| 2022 | 401 | 431 |
| 2023 | 354 | 340 |
| 2024 | 245 | 312 |
| 2025 | 208 | 276 |
| 2026 | 172 | 198 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- G03B 21/2006Characterised by the light source4,094
- G03B 21/208Homogenising, shaping of the illumination light1,697
- G03B 21/2066Reflectors in illumination beam1,502
- G03B 21/2073Polarisers in the lamp house997
- G03B 21/2053Intensity control of illuminating light789
- G03B 21/206Control of light source other than position or intensity395
- G03B 21/2046Positional adjustment of light sources215
- G03B 21/2086Security or safety means in lamp houses131
Recent patents
- Projection optical system and projector6 Oct 2026US 12,754,405 B2Seiko Epson Corporation
- Projector with improved configuration of cooling apparatus6 Oct 2026US 12,754,464 B2Seiko Epson Corporation
- Increased red content in high CRI high brightness light source6 Oct 2026US 12,754,466 B2Signify Holding B. V.
- Reflective diffusion device and projection device6 Oct 2026US 12,754,467 B2Coretronic Corporation
- Illumination system having multiple light source modules and projection device6 Oct 2026US 12,754,468 B2Coretronic Corporation
- Laser reflection unit8 Oct 2026US 2026/0310055 A1Barco N.V.
- Projector8 Oct 2026US 2026/0310056 A1Seiko Epson Corporation
- Light source system, projection device, and adjustment method of position of light emitting unit8 Oct 2026US 2026/0310057 A1Coretronic Corporation
- Light source device and image display device8 Oct 2026US 2026/0310058 A1Sony Semiconductor Solutions Corporation
- Light source system and projection device8 Oct 2026US 2026/0310059 A1XGIMI Technology CO., LTD
Most cited
By later US patents
- Augmented reality glasses for medical applications and corresponding augmented reality system307US 10,197,803 B2Alma Mater Studiorum - Università di Bologna · 2019
- System and method employing LED light sources for a projection display246US 6,224,216 B1InFocus Corporation · 2001
- Optical systems for projection displays240US 6,461,000 B1U. S. Precision Lens, Inc. · 2002
- Efficient light engine systems, components and methods of manufacture199US 6,356,700 B12002
- Laser based display method and system194US 8,427,590 B2Soraa, Inc. · 2013