Granted Patent
Utility
US 5,196,682 · App. 07/363,421
Infrared optical card having an opaque case for hiding internal components
Inventor:
Gary A. Englehardt
Patented Case
View Patent ↗
Granted: Mar 23, 1993
Filed: May 31, 1989
Inventor
Gary A. Englehardt
Assignee (at issue)
Wang Laboratories, 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.