G03B 23/00
Devices for changing pictures in viewing apparatus or projectors
G03B23/00 (Devices for changing pictures in viewing apparatus or projectors) appears on 329 US grants and 84 published applications in this corpus.
Search patents in G03B- Granted patents
- 329
- Published applications
- 84
- Assignees
- 129
- Inventors
- 417
- Latest grant
- 6 Jan 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 22 | 0 |
| 1977 | 14 | 0 |
| 1978 | 14 | 0 |
| 1979 | 14 | 0 |
| 1980 | 16 | 0 |
| 1981 | 16 | 0 |
| 1982 | 6 | 0 |
| 1983 | 18 | 0 |
| 1984 | 15 | 0 |
| 1985 | 7 | 0 |
| 1986 | 11 | 0 |
| 1987 | 9 | 0 |
| 1988 | 25 | 0 |
| 1989 | 12 | 0 |
| 1990 | 11 | 0 |
| 1991 | 7 | 0 |
| 1992 | 6 | 0 |
| 1993 | 8 | 0 |
| 1994 | 4 | 0 |
| 1995 | 6 | 0 |
| 1996 | 3 | 0 |
| 1997 | 3 | 0 |
| 1998 | 6 | 0 |
| 1999 | 2 | 0 |
| 2000 | 5 | 0 |
| 2001 | 1 | 2 |
| 2002 | 6 | 4 |
| 2003 | 1 | 1 |
| 2004 | 3 | 3 |
| 2005 | 3 | 9 |
| 2006 | 4 | 5 |
| 2007 | 3 | 2 |
| 2008 | 4 | 4 |
| 2009 | 0 | 1 |
| 2010 | 0 | 4 |
| 2011 | 1 | 1 |
| 2012 | 0 | 1 |
| 2013 | 3 | 0 |
| 2014 | 1 | 3 |
| 2015 | 3 | 2 |
| 2016 | 3 | 1 |
| 2017 | 0 | 5 |
| 2018 | 7 | 6 |
| 2019 | 6 | 7 |
| 2020 | 1 | 3 |
| 2021 | 6 | 4 |
| 2022 | 2 | 4 |
| 2023 | 6 | 4 |
| 2024 | 1 | 2 |
| 2025 | 3 | 5 |
| 2026 | 1 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- G03B 23/02In which pictures are removed from, and returned to, magazines153
- G03B 23/08In which pictures are attached to a movable carrier94
- G03B 23/18Devices for changing pictures in viewing apparatus or projectors: with fade-in and26
- G03B 23/14Carriers operable to move pictures into, and out of, the projection or9
Recent patents
- Story projector6 Jan 2026US 12,517,421 B2Shenzhen Bolong Technology Co. Ltd.
- Double image projection lamp with fade-in and fade-out visual effects30 Dec 2025US 12,510,817 B2Gemmy Industries Corporation
- Seats with display systems1 Jul 2025US 12,346,013 B2Textron Innovations Inc.
- Doorbell communication systems and methods13 May 2025US 12,300,092 B2SkyBell Technologies IP, LLC
- Binocular/tripod adapter system27 Feb 2024US 11,913,596 B2
- Doorbell communication systems and methods16 Apr 2026US 2026/0105817 A1SkyBell Technologies IP, LLC
- Story projector16 Oct 2025US 2025/0321475 A1Shenzhen Bolong Technology Co. Ltd.
- Multifunctional Image Mapping Device28 Aug 2025US 2025/0271747 A1
- System and method for calibration of optical measurement devices15 May 2025US 2025/0155319 A1Chroma Ate Inc.
- Double image projection lamp with fade-in and fade-out visual effects17 Apr 2025US 2025/0123548 A1Gemmy Industries Corporation
Most cited
By later US patents
- Projection display system110US 6,331,848 B1U. S. Philips Corporation · 2001
- Device for mounting diapositives in a strip and an apparatus for projecting the strip-mounted diapositives68US 4,431,282 A1984
- Device for mounting diapositives in a strip and an apparatus for projecting the strip-mounted diapositives53US 4,417,792 A1983
- Picture viewer48US 4,259,802 ALicinvest AG · 1981
- Picture viewer40US 4,376,348 ALicinvest AG · 1983