G03B 21/44
Mechanisms transmitting motion to film-strip feed
Official title: Mechanisms transmitting motion to film-strip feed; Mechanical linking of shutter and intermittent feed
G03B21/44 (Mechanisms transmitting motion to film-strip feed) appears on 56 US grants and 10 published applications in this corpus.
Search patents in G03B- Granted patents
- 56
- Published applications
- 10
- Assignees
- 28
- Inventors
- 81
- Latest grant
- 23 Jun 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 6 | 0 |
| 1978 | 9 | 0 |
| 1979 | 4 | 0 |
| 1980 | 3 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 2 | 0 |
| 1984 | 0 | 0 |
| 1985 | 2 | 0 |
| 1986 | 0 | 0 |
| 1987 | 1 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 1 | 0 |
| 1991 | 0 | 0 |
| 1992 | 6 | 0 |
| 1993 | 2 | 0 |
| 1994 | 0 | 0 |
| 1995 | 2 | 0 |
| 1996 | 0 | 0 |
| 1997 | 4 | 0 |
| 1998 | 1 | 0 |
| 1999 | 3 | 0 |
| 2000 | 3 | 0 |
| 2001 | 0 | 1 |
| 2002 | 1 | 0 |
| 2003 | 0 | 2 |
| 2004 | 0 | 1 |
| 2005 | 0 | 1 |
| 2006 | 0 | 2 |
| 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 | 0 |
| 2018 | 0 | 0 |
| 2019 | 0 | 0 |
| 2020 | 0 | 1 |
| 2021 | 1 | 2 |
| 2022 | 2 | 0 |
| 2023 | 0 | 0 |
| 2024 | 0 | 0 |
| 2025 | 0 | 0 |
| 2026 | 2 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Projection device23 Jun 2026US 12,663,699 B1
- Projector assembly5 May 2026US 12,619,139 B1
- Projector recommendation method and projector recommendation system13 Sep 2022US 11,442,350 B2Benq Corporation
- Projector23 Aug 2022US 11,422,444 B2Seiko Epson Corporation
- Projection optical system, projection-type image display device, and imaging device27 Jul 2021US 11,073,753 B2Seiko Epson Corporation
- Projector recommendation method and projector recommendation system22 Jul 2021US 2021/0223673 A1Benq Corporation
- Projector24 Jun 2021US 2021/0191240 A1Seiko Epson Corporation
- Projection optical system, projection-type image display device, and imaging device3 Sep 2020US 2020/0278600 A1Seiko Epson Corporation
- Switchable format film projection system23 Mar 2006US 2006/0061732 A1
- System and method for registering motion picture film26 Jan 2006US 2006/0017884 A1
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