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
Quinoline compounds and their use for treating viral infection
Method of manufacturing acrylic film, and acrylic film
Flame retardant thermoplastic elastomers
Method for driving bistable display device
Image sensor with improved color crosstalk
Techniques for accessing a parallel database system via external programs using vertical and/or horizontal partitioning
Wireless communication power control
  Randomly Featured Patents
Tissueless pre-printed spirit duplicating masters
Stable high solids aqueous dispersions of hydrophobizing agents
Bicycle frame
Modified sulphur and product comprising modified sulphur as binder
Ergonomic and adjustable veterinary apparatus for movement restriction
Charge control apparatus for battery pack which uses rate of change of battery temperature adjusted by correction factor
Goal post pad
Session-based processing method and system
Shifter mounted accessory control panel
Air displacement pipetter