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Your search returned 124 patents.
( 430/4 in Current US Classification ) |
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| Patent ID | Title | Date Filed |
| 4806442 | Spatial phase modulating masks and production processes thereof, and processes for the formation of phase-shifted diffraction gratings
| March 20, 1986 |
| 4783385 | Photographic masks for tonal correction
| March 31, 1987 |
| 4756993 | Electrophotographic photoreceptor with light scattering layer or light absorbing layer on support backside
| January 27, 1987 |
| 4749869 | Process for irradiating topaz and the product resulting therefrom
| May 14, 1986 |
| 4672024 | Immunological detection device and method for its preparation
| April 18, 1984 |
| 4618552 | Light receiving member for electrophotography having roughened intermediate layer
| February 12, 1985 |
| 4605606 | Gaussian laser beam filter
| February 28, 1985 |
| 4579808 | Imageable colloidal metal/mercaptan elements
| July 27, 1984 |
| 4567123 | Diffusing plate
| January 25, 1985 |
| 4567122 | Phototropic materials
| January 6, 1983 |
| 4547262 | Method for forming thin film passive light waveguide circuit
| August 30, 1984 |
| 4545646 | Process for forming a graded index optical material and structures formed thereby
| September 2, 1983 |
| 4482608 | Release coating for infrared imageable and thermally imageable films
| July 26, 1982 |
| 4482489 | Light-sensitive diazonium trifluoromethane sulfonates
| November 15, 1982 |
| 4465540 | Method of manufacture of laminate radiation collimator
| April 6, 1981 |
| 4463074 | Elements containing ordered wall arrays
| February 9, 1983 |
| 4450215 | Color filter elements comprising hexaalkoxymethylmelamine barrier layers
| June 6, 1983 |
| 4440840 | Photographic image-processing method
| October 20, 1982 |
| 4414317 | Transparency, a method for forming it and a photographic mask whose optical densities are correlated with the contour of a surface
| April 21, 1982 |
| 4401367 | Method for pattern masking objects and the products thereof
| November 3, 1980 |
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