Resources Contact Us Home
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
Fuel cell and a method of manufacturing a fuel cell
Targeting agents for enhancing radiation therapy
System or method to assist and automate an information security classification and marking process for government and non-government organizations for information of an electronic document
VGPU: a real time GPU emulator
Battery comprising circuitry for charge and discharge control, and method of operating a battery
  Randomly Featured Patents
Electromagnetic valve apparatus
Method of treating and degerminating bath water, particularly bath water contaminated by the germ bact. pseudomonas pyocanea, in medical tub-baths and underwater massage baths
Apparatus and methods for supporting 802.1X in daisy chained devices
LED lamp
Compositions containing interleukin-1 and peptides
Friction transmission unit
Scroll fluid-machine and assembling method thereof
Mercaptofunctional high .mu..beta. EO chromophores and high Tg, low optical loss, covalently bonded, high .mu..beta. EO chromophore containing polymers and methods of synthesizing EO materials
Vertical support structure
Methods of hydrocarbon detection using wavelet dominant frequency and a measure of energy loss on the high-frequency side of wavelet dominant frequency