| Patents for G03B 23 - Devices for changing pictures in viewing apparatus or projectors (977) |
|---|
| 11/13/1979 | US4174158 Bowed slide handling apparatus |
| 11/06/1979 | US4173282 Spare lamp holder |
| 10/31/1979 | EP0005072A1 Slide transport system for a multiple optics slide projector and multiple slide projector equiped with same |
| 10/09/1979 | US4170409 Still projector with cover |
| 10/02/1979 | US4169669 Film winding device for slide projectors |
| 10/02/1979 | US4169668 Transparency projector comprising a plurality of optical systems |
| 09/04/1979 | US4166588 Self-threading take-up magazine for a photographic printer |
| 08/28/1979 | US4165928 Slide projector drive mechanism for a circular magazine |
| 08/28/1979 | US4165927 Photographic slide projector |
| 08/21/1979 | US4165162 Track-type slide projector magazine |
| 08/21/1979 | US4165161 Multiple optics slide projector |
| 06/19/1979 | US4158491 Photographic film projection dissolve system for arc lamp projectors |
| 05/08/1979 | US4153361 Web cassette with cartridge load |
| 05/08/1979 | US4153353 Film transport for a viewer |
| 05/01/1979 | CA1053638A1 Device for delivery of tape material |
| 02/27/1979 | US4141631 Photographic slide magazine spring assembly |
| 02/13/1979 | US4139287 Projector leveling and focusing aid and method of using same |
| 01/02/1979 | US4132469 Apparatus for selectively viewing a plurality of recording elements |
| 12/19/1978 | US4130353 Projector with controls for the slide changer |
| 12/05/1978 | CA1043855A1 Methods and apparatus for controlling slide projectors |
| 12/05/1978 | CA1043600A1 Slide compartment advance control mechanism_ |
| 11/28/1978 | US4127324 Dual photographic slide projector |
| 11/07/1978 | US4124284 Multiple image projection device |
| 10/17/1978 | CA1040548A1 Microfiche cartridge |
| 08/15/1978 | US4106867 Slide projector for both magazine and single slide projection |
| 08/08/1978 | US4105317 Circular magazine for linear magazine slide projectors |
| 08/08/1978 | US4105316 Film strip projection apparatus |
| 08/08/1978 | US4105314 Hand crank generator-powered rotary slide projector |
| 07/18/1978 | CA1034793A1 Slide changer actuator for slide projectors |
| 06/13/1978 | US4094599 Flexible magazine slide projector with movable lens |
| 05/30/1978 | US4092574 Automatic remote controlled opthalmic refracting chart projector |
| 05/02/1978 | US4087167 Dual photographic slide projector |
| 04/25/1978 | US4086005 Audio-visual programmer |
| 02/28/1978 | US4076401 Arrangement and method for the storage of lantern slides and projector for viewing thereof |
| 02/28/1978 | US4076399 Control mechanism for a plurality of slide projectors |
| 01/17/1978 | US4068809 Filmstrip cartridge with film lock |
| 12/20/1977 | US4063465 Magazine feeding mechanism for dual slide projectors |
| 11/22/1977 | US4059355 Micro-composing reduction printer |
| 11/22/1977 | US4059352 Slide projector |
| 10/11/1977 | US4053215 Film strip handling apparatus and method |
| 08/16/1977 | US4042185 Device for receiving a tape of material |
| 08/09/1977 | US4041457 Sound-slide projector control apparatus |
| 07/12/1977 | US4034540 Portable dual spool microfilm reading device |
| 06/21/1977 | US4030822 Mechanism for controlling the advance of a magazine in a transparency projector |
| 06/21/1977 | US4030601 Holders for tape cassettes |
| 06/14/1977 | US4029408 Map reading apparatus |
| 05/31/1977 | US4026645 Circular photographic slide tray |
| 05/24/1977 | US4025183 Processorprojector and sub-systems |
| 05/24/1977 | US4025177 Microfiche viewer |
| 05/24/1977 | US4024966 Automatic slide magazine handler |
| 04/26/1977 | US4020464 Programmer expander for a plurality of devices |
| 04/19/1977 | US4018521 Mixed slide separator |
| 02/22/1977 | US4008953 Projector control mechanism |
| 12/14/1976 | US3997256 Microfiche cartridge |
| 11/30/1976 | US3994578 Projector with a circular magazine |
| 11/09/1976 | US3990790 Slide projectors |
| 08/31/1976 | US3978503 Light shield mechanism for quadrilateral opening |
| 08/31/1976 | US3977519 Slide storage tray |
| 08/10/1976 | US3973842 Magazine for slides for the simultaneous projection of pictures and reproduction of sound |
| 07/13/1976 | US3968878 Circular magazine for photographic transparencies |
| 06/15/1976 | US3963336 Film strip handling apparatus and method |
| 06/08/1976 | US3961846 Ultra-high reduction microfiche layout and positioning mechanism therefor |
| 05/25/1976 | US3958875 Apparatus for controlling slide projectors |
| 04/27/1976 | US3953119 Slide projector and indexing mechanism for alternate slide trays of different configurations |
| 04/27/1976 | US3953118 Reset mechanism for an audio-visual device |
| 04/20/1976 | US3951537 Slide projector control device |
| 04/20/1976 | US3951324 Processorprojector and sub-systems |
| 04/13/1976 | US3950087 Slide projector for receiving alternate slide trays of different configurations |
| 03/30/1976 | US3947102 Apparatus for retrieving microimages |
| 03/23/1976 | US3945720 Map displays |
| 02/17/1976 | US3938886 Slide projector controllable of its projection time |
| 02/10/1976 | US3937569 Slide projector having a partitioned magazine |
| 02/10/1976 | US3937568 Film strip advance mechanism |
| 02/10/1976 | US3937325 Cartridge with lock stabilization |
| 02/03/1976 | US3936169 Device for moving slides vertically in projectors |
| 02/03/1976 | US3935652 Circular magazine for a slide projector |
| 01/20/1976 | US3933413 Drive mechanism for a spiral array of individual film photographs |