G03B 21/325
Endless cassettes
Official title: {Endless cassettes}
G03B21/325 (Endless cassettes) appears on 11 US grants and 2 published applications in this corpus.
Search patents in G03B- Granted patents
- 11
- Published applications
- 2
- Assignees
- 7
- Inventors
- 14
- Latest grant
- 13 Nov 2018
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 4 | 0 |
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 1 | 0 |
| 1980 | 1 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 1 | 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 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 1 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 0 |
| 2013 | 0 | 0 |
| 2014 | 0 | 0 |
| 2015 | 0 | 0 |
| 2016 | 0 | 0 |
| 2017 | 0 | 1 |
| 2018 | 2 | 1 |
By publication year. Applications have been published since 2001.
Recent patents
- Projection device for projecting images on a surface of the device13 Nov 2018US 10,126,637 B2Kan Wah Kan Sum
- Projection device for projecting images on a surface of the device17 Apr 2018US 9,946,141 B2Kan Wah Kan Sum
- Image projector forming scrolling image9 Mar 2004US 6,702,445 B1Mr. Christmas Incorporated
- Endless film cartridge and pressure support plate therefor23 Sep 1986US 4,613,220 AC. A. Parshall, Inc.
- Film cartridge15 Apr 1980US 4,198,134 AMontron Corporation
Most cited
By later US patents
- Endless loop cassette5US 3,967,788 A1976
- Image projector forming scrolling image4US 6,702,445 B1Mr. Christmas Incorporated · 2004
- Cassette for an endless type cinefilm3US 3,966,134 ACopal Company Limited · 1976
- Projection device for projecting images on a surface of the device2US 10,126,637 B2Kan Wah Kan Sum · 2018
- Cartridge for audio-visual projectors2US 3,994,577 ACopal Company Limited · 1976