Granted Patent
Utility
US 5,087,937 · App. 07/578,571
Photoelectric scanner
Inventors:
Beat Frick, Walter Kraft, Karl Ursprung
Patented Case
View Patent ↗
Granted: Feb 11, 1992
Filed: Sep 7, 1990
Inventors
Beat Frick
Walter Kraft
Karl Ursprung
Assignee (at issue)
Gretag Systems, 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.