Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Process and device for copying photographic color images










Image Number 2 for United States Patent #4050807.

A blocking filter is used, in conjunction with the substractive filter method of copying photographic color images, to remove or substantially remove by greatly weakening wave lengths from the copying light in the range in which the filter characteristics of the blue and green color filters or the spectral sensitivity curves of photographic copying paper overlap each other, or more particularly in a 30 nm belt about a central wave length of approximately 500 nm.








 
 
  Recently Added Patents
Re-establishing push notification channels via user identifiers
Metal foil laminate, substrate for mounting LED, and light source device
Method and apparatus for secure transfer and playback of multimedia content
Verification of a portable consumer device in an offline environment
Zoom lens
System and method for burst separation and extended interleaving length
Door-activated entry light fixture
  Randomly Featured Patents
Tire for motor vehicle wheels having a surface-worked annular surface at the sidewalls thereof
Glasses with safety device and three-dimensional glasses with safety device
Apparatus for sewing over-edge stitch in carpet
System and method of displaying information on desktop
Electrical outlet covering accessory movable between positions concealing and allowing access to the outlet
Field-rate upconversion of television signals
Preparation of 1,1,1,3,3,3-hexafluoropropane-2-ol by hydrogenolysis of hexafluoroacetone hydrate
Sampling and measuring device with calibrating piston
Light bar having multiple levels and multiple rows of lights and having end extensions
Air-gap winding stator construction for dynamoelectric machine