G03B 23/046
Picture changing devices
Official title: {Picture changing devices}
G03B23/046 (Picture changing devices) appears on 7 US grants and 1 published applications in this corpus.
Search patents in G03B- Granted patents
- 7
- Published applications
- 1
- Assignees
- 5
- Inventors
- 14
- Latest grant
- 17 Aug 2004
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 | 2 | 0 |
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 1 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 1 | 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 | 1 |
| 2004 | 1 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Dual image slide and/or video projector17 Aug 2004US 6,776,490 B2
- Device for moving a slide into a slide gate and for receiving a lens mount12 Apr 1994US 5,302,984 AEastman Kodak Company
- Slide changing apparatus with slide jam protection12 Jun 1990US 4,933,690 AEastman Kodak Company
- Slide transfer and shutter control arrangement for slide projector7 Feb 1984US 4,429,963 ABell & Howell Company
- Slide projector31 May 1983US 4,385,815 AAgfa-Gevaert
Most cited
By later US patents
- Slide changing apparatus with slide jam protection3US 4,933,690 AEastman Kodak Company · 1990
- Dual image slide and/or video projector3US 6,776,490 B22004
- Device for moving slides vertically in projectors2US 3,936,169 ABraun GmbH · 1976
- Diaprojector2US 4,382,663 AAgfa-Gevaert · 1983
- Slide transfer and shutter control arrangement for slide projector2US 4,429,963 ABell & Howell Company · 1984