| Patents for G03B 21 - Projectors or projection-type viewers; Accessories therefor (41,465) |
|---|
| 11/21/1990 | CN1047147A Film projecting automatic cut-over method for film projector and its apparatus |
| 11/20/1990 | US4971436 Projector |
| 11/15/1990 | DE3915174A1 Overhead projector optical system - has display lens axis offset from that of condenser lens and inclined to it |
| 11/14/1990 | EP0397634A2 A masking device |
| 11/14/1990 | EP0397381A2 Projection type display unit using liquid crystal display devices |
| 11/13/1990 | US4970545 Image retrieval system |
| 11/13/1990 | US4969734 Apparatus and method of forming and projecting high precision optical images |
| 11/13/1990 | US4969733 Foldable portable overhead projector |
| 11/13/1990 | US4969732 Display device |
| 11/13/1990 | US4969731 Liquid crystal panel type projection display |
| 11/07/1990 | EP0396128A2 Catadioptric projector, catadioptric projection system and process |
| 11/06/1990 | US4968134 Overhead projector |
| 11/06/1990 | US4967975 Means and method for changing a portion of a movie film |
| 10/31/1990 | EP0395156A1 Optical illumination system and projection apparatus comprising such a system |
| 10/31/1990 | EP0394364A1 Film-strip feed device |
| 10/31/1990 | EP0394340A1 Rear projection system |
| 10/30/1990 | US4967235 Image formation apparatus for displaying or recording a pre-selected image area of a film |
| 10/24/1990 | EP0393155A1 Film transport device. |
| 10/24/1990 | EP0393154A1 Film transport device. |
| 10/24/1990 | EP0393132A1 Theatrical system |
| 10/23/1990 | US4964719 Control method of brightness of screen used for projection display and control apparatus of the same |
| 10/23/1990 | US4964695 Lenticular arrays for front projection screens and contrast improving method and device |
| 10/16/1990 | US4963923 Microfilm projecting apparatus |
| 10/16/1990 | US4963016 Compact rear-projection system with obliquely incident light beam |
| 10/16/1990 | CA1275191C Transparency presentation device |
| 10/10/1990 | CN1046050A Extensing mirror for reflecting type screen |
| 10/09/1990 | US4962420 Entertainment video information system having a multiplane screen |
| 10/09/1990 | US4961642 Projection type display device for monitoring at short distance |
| 10/09/1990 | US4961641 Slide projector with ergonomic slide selection and access |
| 10/04/1990 | WO1990011545A1 Illuminating device having a high luminosity factor |
| 10/03/1990 | CN2063243U Projector for uniform-speed circular motion |
| 10/02/1990 | US4961086 Device for reading positional information on photographic films |
| 10/02/1990 | US4960314 Diffraction optics diffusing screen laminate for full color on-axis viewing |
| 10/02/1990 | CA1274713A1 Transmission projection screen and method of manufacturing same |
| 10/02/1990 | CA1274712A1 Rear-projection screen |
| 09/27/1990 | DE3909160A1 Archive and magazine system for presentation films |
| 09/26/1990 | EP0359804A4 Screen simulator window |
| 09/26/1990 | CN2062861U Projection optical lantern |
| 09/25/1990 | US4958450 Protective holder for holding thin or substantially thin items |
| 09/21/1990 | WO1990011549A1 Device for the presentation of an image with a light-deflecting part |
| 09/21/1990 | CA2049011A1 Device for the presentation of an image with a light-deflecting part |
| 09/20/1990 | DE3908871A1 Overheadprojektor Overhead Projector |
| 09/19/1990 | EP0225387B1 Slide archival storage and retrieval system |
| 09/19/1990 | CN1045458A Method of and apparatus for producing required visual signal for direct observation from first source of light in presence of second source of light |
| 09/18/1990 | US4958240 Original reading apparatus applying a lamp voltage to correct lamp blackening |
| 09/18/1990 | US4958186 Image recording apparatus |
| 09/12/1990 | EP0386837A1 Tape apparatus |
| 09/12/1990 | CN1045300A Method of and an apparatus for projecting a scanned two-or three-dimensional modulated light pattern originating from a light source |
| 09/11/1990 | US4956664 Image processing apparatus having an overhead projector |
| 09/11/1990 | US4956655 Projecting apparatus |
| 09/11/1990 | US4956225 Transparency with a polymeric substrate and toner receptive coating |
| 09/11/1990 | US4955937 Method of manufacturing a master intended for the manufacture of projection screens and tool for carrying out the method |
| 09/05/1990 | EP0385705A2 Apparatus and method for digitized 3D video system |
| 09/05/1990 | CN1009497B Device for storing and handiling slides |
| 09/04/1990 | US4954890 Driving method for 3-D high luminance LCD projector |
| 09/04/1990 | US4953971 Interactive image projection apparatus |
| 09/04/1990 | US4953948 Rear projection screen |
| 09/04/1990 | US4953609 Portable screen |
| 08/28/1990 | US4952053 Transparency overhead projector |
| 08/28/1990 | US4952052 Microfilm reader for microfiche films |
| 08/23/1990 | DE3904835A1 Liquid crystal display device |
| 08/22/1990 | EP0383424A1 Mask for an overhead projector |
| 08/21/1990 | US4951160 Image reproducing apparatus |
| 08/21/1990 | US4950072 Presentation device for overhead projector |
| 08/21/1990 | US4949912 Film transfer and edit adaptor |
| 08/16/1990 | EP0220277B1 Reader-printer apparatus and method for variable length copying of information on a standard sheet length |
| 08/14/1990 | US4949106 Microfilm searching and reading device |
| 08/14/1990 | US4948537 Molding, curing first then second resin while controlling temperature |
| 08/09/1990 | WO1990008976A1 Photographic accessory device to distribute slides onto a transparent screen without need to manipulate individual slides |
| 08/08/1990 | EP0381417A1 Rear projection screen and method of manufacturing the same |
| 08/08/1990 | EP0380994A2 Screen for a projection copying apparatus |
| 08/08/1990 | CN1009133B Rear projection system |
| 08/07/1990 | USRE33293 Reader-printer |
| 08/07/1990 | US4947213 Projection copying apparatus |
| 08/07/1990 | US4946327 Film carriage assembly and method for moving and storing a film platter |
| 08/07/1990 | US4946274 Presentation device used in combination with an overhead projector |
| 08/07/1990 | CA1272407A1 Microfilm reader and printer |
| 08/02/1990 | DE3939996A1 Projection TV screen with wide-range extinction rate - incorporates Fresnel lens facing double-sided cylindrical lens array and scattering layer with enlarged extinction sections |
| 08/02/1990 | CA2009004A1 Projection copying apparatus and projection screen therefor |
| 07/31/1990 | US4944586 Automated transparency organizer |
| 07/31/1990 | US4944578 Color graphic imager utilizing a liquid crystal display |
| 07/25/1990 | CN1008949B Back projection screens and its back projection system |
| 07/24/1990 | US4943156 Off axis fresnel reflector for liquid crystal display |
| 07/24/1990 | US4942684 Slide mount for perforated films |
| 07/18/1990 | EP0268620B1 Projectable passive liquid crystal display |
| 07/18/1990 | CN1008834B Backlighting for providing partly-adjusting tonal value, it's suitable for light-tight case of observing light-transmitting body |
| 07/17/1990 | US4942425 Microfilm image processing apparatus |
| 07/17/1990 | US4942411 Automatic overlay feed apparatus for an overhead projector |
| 07/17/1990 | US4941732 For observing a light image |
| 07/12/1990 | WO1990007365A1 Information videoinstallation |
| 07/05/1990 | DE3844171A1 Receiving box (accommodating box) for projection screens which can be wound up |
| 07/04/1990 | CN2058998U Projector capable of producing dynamic image |
| 07/03/1990 | US4939538 Microfilm image processing apparatus |
| 07/03/1990 | US4938587 Foldable optical apparatus |
| 07/03/1990 | US4938586 Information projecting apparatus |
| 06/27/1990 | EP0375425A2 Projection pad incorporating a liquid crystal panel |
| 06/27/1990 | CN2058763U Multifunctional overhead projector |
| 06/26/1990 | US4937683 Image recording apparatus |
| 06/26/1990 | US4936677 Projection apparatus |
| 06/26/1990 | US4936658 Projection type liquid crystal displaying device |