G03B 21/48
For altering frame speed
Official title: for altering frame speed; for regulating constancy of film speed
G03B21/48 (For altering frame speed) appears on 17 US grants and 3 published applications in this corpus.
Search patents in G03B- Granted patents
- 17
- Published applications
- 3
- Assignees
- 13
- Inventors
- 23
- Latest grant
- 30 May 2000
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 2 | 0 |
| 1978 | 1 | 0 |
| 1979 | 1 | 0 |
| 1980 | 1 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 1 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 1 | 0 |
| 1991 | 0 | 0 |
| 1992 | 3 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 2 | 0 |
| 1998 | 1 | 0 |
| 1999 | 1 | 0 |
| 2000 | 2 | 0 |
| 2001 | 0 | 1 |
| 2002 | 0 | 0 |
| 2003 | 0 | 1 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 1 |
By publication year. Applications have been published since 2001.
Recent patents
- Film web motion control system30 May 2000US 6,068,206 AEastman Kodak Company
- Switchable format film projection system1 Feb 2000US 6,019,473 AMaxiVision Cinema Technology
- Switchable pulldown film projection system31 Aug 1999US 5,946,076 AMaxiVision Cinema Technology
- Method for exhibiting cinematic images photographed at two different frame rates14 Apr 1998US 5,739,894 A
- Method for imparting both high-impact cinematic images and conventional cinematic images on the same strip of motion picture film6 May 1997US 5,627,614 A
Most cited
By later US patents
- Motion picture projector system17US 4,150,886 AAirborne Mfg. Co. · 1979
- Electronic projector16US 4,697,896 AShowscan Film Corporation · 1987
- Method for transitioning between two different frame rates during a showing of a single motion picture film16US 5,096,286 A1992
- Film web motion control system15US 6,068,206 AEastman Kodak Company · 2000
- Method for exhibiting cinematic images photographed at two different frame rates12US 5,739,894 A1998