Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Inventor:
Gordon; Douglas C.
Address:
Kinburn, CA
No. of patents:
1
Patents:












Patent Number Title Of Patent Date Issued
4891666 Copy indicator for a document January 2, 1990
A printed background pattern for a document is described, wherein the pattern masks a copy indicator which is revealed upon making a copy of the pattern using a digital optical scanning means. The background pattern comprises an area of microprinting with a type size having a line re










 
 
  Recently Added Patents
Method for the hydrolysis of substituted formylamines into substituted amines
Organic electroluminescent element
Camera with monitor
Information repository search system
Defect inspection method and device therefor
Device for producing a connection grid with an integrated fuse
Cis-alkoxy-substituted spirocyclic 1-H-pyrrolidine-2,4-dione derivatives
  Randomly Featured Patents
Target-actuated weapon
Cleavage apparatus
Herbicidal nitrodiphenyl ethers
Exercising device
Portable communicator
Lipid-protein compositions and articles and methods for their preparation
Image forming apparatus and charge-voltage generating method
Electrical control system for stairway wheelchair lift
Cubicle clip for retaining papers
Package for electrical components having a molded structure with a port extending into the molded structure