G03B 21/202
Incandescent light sources
Official title: {Incandescent light sources}
G03B21/202 (Incandescent light sources) appears on 17 US grants and 16 published applications in this corpus.
Search patents in G03B- Granted patents
- 17
- Published applications
- 16
- Assignees
- 11
- Inventors
- 29
- Latest grant
- 26 May 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1979 | 1 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 2 | 0 |
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 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 | 1 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 1 |
| 2010 | 0 | 0 |
| 2011 | 0 | 1 |
| 2012 | 0 | 1 |
| 2013 | 0 | 0 |
| 2014 | 1 | 0 |
| 2015 | 2 | 5 |
| 2016 | 2 | 1 |
| 2017 | 2 | 1 |
| 2018 | 0 | 0 |
| 2019 | 0 | 0 |
| 2020 | 0 | 0 |
| 2021 | 0 | 3 |
| 2022 | 3 | 2 |
| 2023 | 1 | 0 |
| 2024 | 0 | 1 |
| 2025 | 0 | 0 |
| 2026 | 1 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Light source device and projector26 May 2026US 12,638,762 B2Seiko Epson Corporation
- Optical system, projector, and imaging apparatus3 Oct 2023US 11,774,731 B2Seiko Epson Corporation
- Liquid crystal projector and method for controlling liquid crystal projector11 Oct 2022US 11,468,805 B2Seiko Epson Corporation
- Projector4 Oct 2022US 11,460,756 B2Seiko Epson Corporation
- Light source system and projection device using same26 Apr 2022US 11,314,156 B2Hon Hai Precision Industry Co., Ltd.
- Light source device and projector19 Sep 2024US 2024/0310712 A1Seiko Epson Corporation
- Liquid crystal projector and method for controlling liquid crystal projector19 May 2022US 2022/0157211 A1Seiko Epson Corporation
- Optical system, projector, and imaging apparatus3 Mar 2022US 2022/0066180 A1Seiko Epson Corporation
- Light source system and projection device using same18 Nov 2021US 2021/0356851 A1Hon Hai Precision Industry Co., Ltd.
- Projection optical apparatus and projector28 Oct 2021US 2021/0333700 A1Seiko Epson Corporation
Most cited
By later US patents
- Front loading projection unit with wireform retention member8US 4,376,967 AGTE Products Corporation · 1983
- Switching device for projection lamp7US 4,150,887 A1979
- Fixed image projecting apparatus3US 6,402,326 B12002
- Discharge lamp driving device, light source device, projector, and discharge lamp driving method3US 9,338,416 B2Seiko Epson Corporation · 2016
- Discharge lamp driving device, light source device, projector, and discharge lamp driving method3US 9,398,275 B2Seiko Epson Corporation · 2016