Granted Patent
Utility
US 5,214,530 · App. 07/799,862
Optically variable interference device with peak suppression and method
Inventors:
Paul G. Coombs, Roger W. Phillips
Patented Case
View Patent ↗
Granted: May 25, 1993
Filed: Nov 27, 1991
Inventors
Paul G. Coombs
Roger W. Phillips
Assignee (at issue)
Flex Products, Inc.
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.