| Patents for G03B 21 - Projectors or projection-type viewers; Accessories therefor (41,465) |
|---|
| 11/22/1977 | US4059351 Hand-held film projectors |
| 11/22/1977 | US4059339 Brake mechanism for motor driven projection screen |
| 11/08/1977 | US4057338 Fiber optic system |
| 11/08/1977 | US4057337 Compact viewer |
| 11/08/1977 | US4057335 Film drive for motion picture apparatus |
| 11/08/1977 | US4057323 Projection screen |
| 11/01/1977 | US4056318 Optical system for use in microfilm reading and printing apparatus |
| 11/01/1977 | US4055933 Apparatus for packaging photographic slides in envelopes |
| 10/18/1977 | US4054907 Back projection apparatus |
| 10/18/1977 | US4054819 Motor angular velocity monitor circuit |
| 10/18/1977 | US4054382 Optical viewing apparatus |
| 10/18/1977 | US4054379 Reader-printer |
| 10/18/1977 | US4054253 Cinematic projector with integral take-up reel |
| 10/11/1977 | US4053759 Lamphouse and module for photographic slide projectors |
| 10/11/1977 | US4053215 Film strip handling apparatus and method |
| 10/11/1977 | US4053212 Test disk for eye examination |
| 10/11/1977 | US4053208 Rear projection screens |
| 10/11/1977 | US4053206 Multiple function recording and readout system |
| 09/27/1977 | US4050810 Instantaneous imaging microfilm recording camera with blip control |
| 09/27/1977 | US4050799 Microform reader |
| 09/27/1977 | US4050687 Microfiche handling device |
| 09/20/1977 | US4049342 Microfiche cartridge and transport apparatus |
| 09/20/1977 | US4049341 Film carrier for microfilm reader |
| 09/20/1977 | US4049340 Film wind-up arrangement for motion-picture cameras |
| 09/20/1977 | US4048730 Light beam deflection means particularly for range compensation in weapons training aids |
| 09/13/1977 | US4047442 Apparatus for adjusting the rotational speed of a drive mechanism |
| 09/06/1977 | US4046437 Combination cabinet for audio-visual teaching |
| 08/30/1977 | US4045132 Film rewinding device for movie camera |
| 08/30/1977 | US4045123 Control device to position projection screen for viewing |
| 08/23/1977 | US4043652 Automatic microfilm handling apparatus |
| 08/23/1977 | US4043645 Filter device with adjustable superimposed filters |
| 08/16/1977 | US4042389 Method of recording image on lenticulated microfiche |
| 08/16/1977 | US4042297 Film strip projection equipment |
| 08/16/1977 | US4042296 Film cartridge |
| 08/16/1977 | US4042185 Device for receiving a tape of material |
| 08/09/1977 | US4040717 Projection screen for optical images |
| 08/02/1977 | US4039156 Reel |
| 08/02/1977 | US4038768 Viewer storing microfiche file binder |
| 07/26/1977 | US4038691 Still image slide combination with sequentially activated audio channels per slide |
| 07/26/1977 | US4037953 Cassette loading apparatus |
| 07/26/1977 | US4037951 Audio-visual cartridge and player |
| 07/26/1977 | US4037949 Slot load projector |
| 07/26/1977 | US4037926 Photographic film reading instrument |
| 07/19/1977 | US4036555 Electromagnetic trigger device in motor-driven camera capable of time exposure |
| 07/19/1977 | US4036458 Device for the bidirectional movement of an information support |
| 07/12/1977 | US4035078 Method and apparatus for increasing contrast and resolution from low density film |
| 07/12/1977 | US4035062 Method and apparatus for producing an image from a transparent object |
| 07/12/1977 | US4034540 Portable dual spool microfilm reading device |
| 07/05/1977 | US4033686 Micro-image records |
| 07/05/1977 | US4033685 Film reader |
| 07/05/1977 | US4033684 Microfiche reader means |
| 07/05/1977 | US4033683 Image viewing apparatus |
| 07/05/1977 | US4033681 Forward-reverse multi speed film transport mechanism |
| 07/05/1977 | US4033680 Rapid film rewind mechanism |
| 07/05/1977 | US4033523 Film cartridge |
| 06/28/1977 | US4032230 High speed microfilm searching system |
| 06/28/1977 | US4031641 Combined container and viewer package for film transparencies |
| 06/21/1977 | US4030821 Rear screen projector with remote projection capability |
| 06/21/1977 | US4030675 Apparatus for film and tape winding |
| 06/21/1977 | US4030601 Holders for tape cassettes |
| 06/14/1977 | US4029956 Light fixture for projection device |
| 06/14/1977 | US4029408 Map reading apparatus |
| 06/14/1977 | US4029407 Fading mechanism for slide projectors with automatic focusing means |
| 06/14/1977 | US4029406 Micro fiche handler |
| 06/07/1977 | US4027959 Microform viewer for use with a rigid frame |
| 06/07/1977 | US4027957 Illuminated optical viewers |
| 06/07/1977 | US4027832 Leader-pin |
| 06/07/1977 | US4027411 Microfiche marking system |
| 05/31/1977 | US4026644 Device for inscribing additional information on microfilms |
| 05/31/1977 | US4026634 Directional light transmitting screen |
| 05/24/1977 | US4025177 Microfiche viewer |
| 05/24/1977 | US4025176 Graphic communication system |
| 05/24/1977 | US4025175 Machine for reading image carriers |
| 05/24/1977 | US4025160 Dual purpose projection screen |
| 05/17/1977 | US4023903 Light composer for providing even field illumination and diffuse light |
| 05/17/1977 | US4023893 Lamp and lens retrofit assembly for overhead projector |
| 05/10/1977 | US4023194 Photographic system employing a cassette carrying a processing indicator |
| 05/10/1977 | US4022526 Portable film strip projector |
| 05/10/1977 | US4022525 Intermittent film drive for motion picture projector |
| 05/10/1977 | US4022522 Projection screen |
| 05/10/1977 | US4022322 Container for a record carrier |
| 04/26/1977 | US4019815 Film handling apparatus blower system |
| 04/19/1977 | US4018643 Method of forming a packet of separated microscope slides |
| 04/19/1977 | US4018525 Instant image film camera with inspection station |
| 04/19/1977 | US4018520 Projector focusing mechanism |
| 04/19/1977 | US4018518 Large capacity film cassette |
| 04/12/1977 | US4017152 Portable projection screen |
| 04/12/1977 | US4017014 Apparatus for sensing notches |
| 04/05/1977 | US4016406 Automatic film retrieval system and method therefor |
| 04/05/1977 | US4015900 Microfiche reader |
| 03/22/1977 | US4013360 Information storage system |
| 03/22/1977 | US4013353 Optical reflecting system |
| 03/15/1977 | US4012136 Projection device for photogrammetrical purposes |
| 03/15/1977 | US4012134 Bidirectional web medium drive |
| 03/15/1977 | US4012133 Shopping aid display viewer |
| 03/15/1977 | US4012132 Broadcast market survey data storage and retrieval system and method |
| 03/15/1977 | US4012115 Sawtooth shaped front screen |
| 03/08/1977 | US4011571 View finder for cameras |
| 03/08/1977 | US4010910 Film supply and take-up system for motion picture projector |
| 03/01/1977 | US4010491 Automatically retractable tape in sound-slide means |