| Patents for G03B 21 - Projectors or projection-type viewers; Accessories therefor (41,465) |
|---|
| 06/26/1990 | US4936657 Projection type liquid-crystal video display device using a fresnel lens |
| 06/26/1990 | US4936652 Rear projection screen |
| 06/26/1990 | CA1270678A1 Transmission projection screen and method of manufacturing same |
| 06/26/1990 | CA1270677A1 Transmission projection screen and method of manufacturing same |
| 06/26/1990 | CA1270675A1 Light pattern generator |
| 06/20/1990 | EP0373822A2 Projection display using liquid crystal device with reflective color filters |
| 06/19/1990 | US4934821 Technique for scanning a microfilm image moving at a variable speed |
| 06/19/1990 | US4934532 Container for slides |
| 06/14/1990 | WO1990006537A1 Optical system |
| 06/13/1990 | EP0372905A2 Projection-type liquid crystal display apparatus |
| 06/13/1990 | EP0372827A2 Rear-projection screen assembly |
| 06/13/1990 | EP0372568A2 Projector |
| 06/13/1990 | DE3833908A1 Device for the reproduction of pictures (images) |
| 06/12/1990 | US4932644 Sheet feeding process |
| 06/06/1990 | EP0371506A2 Liquid crystal display device |
| 06/06/1990 | EP0371432A2 Transmission type screen and method of manufacturing the same |
| 06/05/1990 | US4931828 Reader-printer |
| 06/05/1990 | US4930886 Opaque adapter for overhead projector |
| 06/05/1990 | US4930721 Roll film driving device |
| 05/31/1990 | WO1990006040A1 Arc lamp stabilization |
| 05/31/1990 | WO1990005943A1 Method and apparatus for automatic printing from microfilm of short image areas |
| 05/31/1990 | WO1990005690A1 Roll brake |
| 05/31/1990 | DE3840346A1 Overhead projector |
| 05/29/1990 | US4929872 Light bulb socket soft start and power interrupt assembly |
| 05/23/1990 | EP0369104A2 A cover for transparencies for use in projectors having a horizontal image carrying face |
| 05/23/1990 | EP0369006A1 Retrieving structure for document piece |
| 05/22/1990 | US4927262 Multiple pupil projection display |
| 05/22/1990 | US4927233 Rear projection screen |
| 05/17/1990 | DE3838098A1 Plate (flange) for endless film projection |
| 05/15/1990 | US4925720 Cover for transparencies for use in projectors having a horizontal image carrying face |
| 05/15/1990 | US4925295 Projection display apparatus |
| 05/14/1990 | EP0277985A4 Liquid crystal motion picture projector with memory. |
| 05/08/1990 | US4924259 Microform printer |
| 05/08/1990 | US4923280 Rear-projection screen |
| 05/03/1990 | WO1990004903A1 Television projection system |
| 05/02/1990 | EP0365853A1 Film slide frame |
| 05/02/1990 | CN1041854A Apparatus and method for converting pictures or images into video signals |
| 05/01/1990 | US4921343 Overhead projector |
| 05/01/1990 | US4921330 Back projection screen in a video projector |
| 05/01/1990 | US4921329 Rear projection screen |
| 04/24/1990 | US4919518 Multi-screen projector |
| 04/24/1990 | US4919515 Screen for a rear projection type television set |
| 04/24/1990 | CA1268065A1 Fresnel lens for projection screens |
| 04/24/1990 | CA1268037A1 Slide frame made of elastic plastic |
| 04/19/1990 | WO1990004208A1 Movable support for transparencies |
| 04/19/1990 | DE3932260A1 Large composite projection wall - has each screen in thin truncated pyramidal open-end housing of specified configuration |
| 04/17/1990 | US4918535 Television projection system |
| 04/17/1990 | US4918361 Torque transmitting apparatus |
| 04/11/1990 | EP0363207A2 A system for displaying an image or object in the presence of ambient light |
| 04/11/1990 | EP0363206A2 A method of and an apparatus for projecting a scanned two- or threedimensional modulated light pattern originating from a light source |
| 04/11/1990 | EP0362737A1 Apparatus and method for converting pictures in video signals |
| 04/11/1990 | EP0222819B1 Reader-printer apparatus with an improved viewing and print mirror assembly |
| 04/10/1990 | US4916485 Xenon optical system for cinematograph projection |
| 04/10/1990 | US4915496 Motorized bottom masking device for wide and/or curved motion picture screens |
| 04/06/1990 | CA2000318A1 Method of and an apparatus for projecting a scanned two- or three-dimensional modulated light pattern originating from a light source |
| 04/06/1990 | CA2000317A1 Method of and an apparatus for producing a required visual signal for direct observation from a first source of light in the presence of a second source of light |
| 04/05/1990 | WO1990003711A1 Loudspeaker |
| 04/05/1990 | WO1990003631A1 Protective holder for holding thin items |
| 04/05/1990 | DE3833106A1 Slide mounts (transparency mounts) |
| 04/05/1990 | CA2000126A1 Apparatus and method for converting pictures or images into video signals |
| 04/04/1990 | EP0361918A2 Rear-projection screen |
| 04/04/1990 | EP0361917A2 Rear-projection screen |
| 04/04/1990 | EP0361249A1 Sound reproduction set for screens |
| 04/03/1990 | US4913539 Apparatus and method for lip-synching animation |
| 03/29/1990 | DE3832617A1 Loudspeaker for a digital control signal |
| 03/29/1990 | DE3832616A1 Loudspeaker |
| 03/28/1990 | EP0360058A2 Slide cassette |
| 03/28/1990 | EP0359804A1 Screen simulator window. |
| 03/28/1990 | CN2055260U Large-sized off-axis film reflecting mirror |
| 03/28/1990 | CN1040897A Colour tone separated colour screen |
| 03/27/1990 | US4912752 Optical projector for transparencies and opaques |
| 03/27/1990 | US4912751 Method and device for establishing and writing a luminous pattern |
| 03/27/1990 | US4911535 Rear screen projection with twisted nematic crystals for improved viewing angle |
| 03/27/1990 | US4911529 Front projection screen |
| 03/27/1990 | US4910873 Image projector for photographs and other objects |
| 03/27/1990 | CA1267024A1 Microfilm reader-printer |
| 03/21/1990 | EP0359494A2 First surface Fresnel reflector for liquid crystal display |
| 03/21/1990 | EP0359461A2 Optical element and system |
| 03/20/1990 | US4909623 "Microfilm image processing apparatus" |
| 03/20/1990 | US4909622 Microfilm retrieval device |
| 03/14/1990 | EP0357942A1 Rotating device for the display of an image through an angle of 360 degrees |
| 03/13/1990 | US4908654 Method and apparatus for automatic printing from microfilm of short image areas |
| 03/13/1990 | US4907873 Magnified image projector apparatus |
| 03/08/1990 | DE3828562A1 Transmitted-light projector |
| 03/06/1990 | US4906091 Glass stage and an overhead type projector system |
| 02/28/1990 | EP0355933A2 Lenticular arrays for front projection screens and contrast improving method and device |
| 02/28/1990 | EP0355407A1 Motor-driven winder |
| 02/27/1990 | US4904079 Liquid crystal display device for overhead projector |
| 02/27/1990 | US4903906 Endless loop transport and storage system |
| 02/22/1990 | WO1990001421A1 Hot melt ink projection transparency |
| 02/22/1990 | WO1990001177A3 Automatic slide loader into the linear or round type magazines for slide projectors |
| 02/20/1990 | US4903073 Image projecting apparatus with margin detect means |
| 02/20/1990 | US4902117 Clothing image mirror projection system |
| 02/20/1990 | US4901936 Core for film spool |
| 02/20/1990 | US4901933 Endless loop transport and storage system |
| 02/15/1990 | DE3827059A1 Folding arm for the projection head of an overhead projector |
| 02/14/1990 | CN2052910U Micro adjustable multi-function film projector |
| 02/14/1990 | CN1039663A Projector apparatus |
| 02/13/1990 | US4900293 For converting a film projector or other film handling device |
| 02/08/1990 | WO1990001177A2 Automatic slide loader into the linear or round type magazines for slide projectors |