Granted Patent
Utility
US 4,295,051 · App. 06/040,571
Optical card reader
Inventors:
Fredy E. Graf, William M. Mahler, Howard J. Malan
Patented Case
View Patent ↗
Granted: Oct 13, 1981
Filed: May 21, 1979
Inventors
Fredy E. Graf
William M. Mahler
Howard J. Malan
Assignee (at issue)
General Atomics
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.