Granted Patent
Utility
US 5,987,136 · App. 08/991,314
Image authentication patterning
Inventors:
John F. Schipper, Allan M. Pelley
Patented Case
View Patent ↗
Granted: Nov 16, 1999
Filed: Dec 16, 1997
Inventors
John F. Schipper
Allan M. Pelley
Assignee (at issue)
Trimble Navigation Limited
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.