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Class Information
Number: 355/38
Name: Photocopying > Projection printing and copying cameras > Multicolor picture > Regulating light intensity or exposure time > Including
Description: Subject matter including a photocell or photomultiplier tube and related electrical circuitry to detect the intensity of light in some part of the optical path.

Patents under this class:
1 2 3 4 5 6 7 8

Patent Number Title Of Patent Date Issued
4080066 Apparatus for prereading film frames or the like Mar. 21, 1978
4079388 Illumination detecting and recording method and device therefor Mar. 14, 1978
4076414 Motion picture printing apparatus Feb. 28, 1978
4068943 Additive color printer control Jan. 17, 1978
4066355 Solid-state color-copying scanner Jan. 3, 1978
4050808 Additive color printing method and apparatus Sep. 27, 1977
4039258 Method and apparatus for making reproductions of photograhic copy negatives or the like Aug. 2, 1977
4030833 Color filter determining apparatus Jun. 21, 1977
4025189 Preparation of half-tone images May. 24, 1977
4017179 Automatic density control Apr. 12, 1977
4017178 Apparatus for detecting a malfunction in a color connecting light valve of a film printer Apr. 12, 1977
3985450 Color filter determining apparatus with indication of the color components to be balanced Oct. 12, 1976
3984185 Process and apparatus for filter value and exposure time determination in photographic color printing and enlarging Oct. 5, 1976
RE28771 Translator for measuring amount of color correction for color Apr. 13, 1976
3947110 Automatic photograph printing control system Mar. 30, 1976
3944362 Method and apparatus for determining the time intensity integral of the exposure of a negative onto photographic paper Mar. 16, 1976

1 2 3 4 5 6 7 8

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