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Class Information
Number: 353/66
Name: Optics: image projectors > Episcope (i.e., opaque projector) > Reflector between lamp and screen
Description: Subject matter including a mirror or reflecting prism positioned between the light source and the viewing screen to direct light along the optical path.
Sub-classes under this class:
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7253954 |
Flat valley fresnel lens |
Aug. 7, 2007 |
| 7102820 |
Flat valley fresnel lens for a display device |
Sep. 5, 2006 |
| 7088509 |
Laminate screen for display device |
Aug. 8, 2006 |
| 6896375 |
Rear projection display device having multiple mirrors that are substantially parallel to a screen |
May. 24, 2005 |
| 6450650 |
Projector with image source from objects |
Sep. 17, 2002 |
| 5993009 |
Multiple magnification contour projector |
Nov. 30, 1999 |
| 5739875 |
Projection unit for projection type display apparatus |
Apr. 14, 1998 |
| 5535061 |
Rotary scanner |
Jul. 9, 1996 |
| 5534955 |
Reflection type projector |
Jul. 9, 1996 |
| 5497207 |
Overhead projector |
Mar. 5, 1996 |
| 5293188 |
Reflecting illumination type projecting device |
Mar. 8, 1994 |
| 5192961 |
Reflecting illumination type projecting device |
Mar. 9, 1993 |
| 5135301 |
Reflective overhead projector with alternate light sources |
Aug. 4, 1992 |
| 5033842 |
Episcopic projector |
Jul. 23, 1991 |
| 5017002 |
Overhead projector |
May. 21, 1991 |
| 4986651 |
Overhead projector with centerless Fresnel lens reflective stage |
Jan. 22, 1991 |
| 4979813 |
Opaque projector |
Dec. 25, 1990 |
| 4978218 |
Folding arm for overhead projector |
Dec. 18, 1990 |
| 4974958 |
Projecting optical apparatus having no trapezoidal distortion |
Dec. 4, 1990 |
| 4969733 |
Foldable portable overhead projector |
Nov. 13, 1990 |
| 4943156 |
Off axis fresnel reflector for liquid crystal display |
Jul. 24, 1990 |
| 4938587 |
Foldable optical apparatus |
Jul. 3, 1990 |
| 4930886 |
Opaque adapter for overhead projector |
Jun. 5, 1990 |
| 4921343 |
Overhead projector |
May. 1, 1990 |
| 4910873 |
Image projector for photographs and other objects |
Mar. 27, 1990 |
| 4824239 |
Reflection-type overhead projector |
Apr. 25, 1989 |
| 4776688 |
Overhead projector |
Oct. 11, 1988 |
| RE32648 |
Opaque projector |
Apr. 19, 1988 |
| 4721380 |
Portable opaque projector |
Jan. 26, 1988 |
| 4696557 |
Collapsible overhead projector |
Sep. 29, 1987 |
| 4682868 |
Thermal management system for an episcopic image projector |
Jul. 28, 1987 |
| 4636050 |
Reflection type overhead projector |
Jan. 13, 1987 |
| 4588271 |
Overhead projector |
May. 13, 1986 |
| 4565430 |
Overhead projector |
Jan. 21, 1986 |
| 4468105 |
Opaque projector |
Aug. 28, 1984 |
| 4406530 |
Reflecting type overhead projector with automatically variable safety illumination |
Sep. 27, 1983 |
| 4380380 |
Episcopic projector |
Apr. 19, 1983 |
| 4112438 |
Method and projection apparatus |
Sep. 5, 1978 |
| 3951535 |
Low profile episcopic projector |
Apr. 20, 1976 |
| 3947103 |
Low profile episcopic projector and opaque materials therefor |
Mar. 30, 1976 |
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