Granted Patent
Utility
US 4,742,213 · App. 06/737,197
Credit card reading apparatus with reliable optical path interrupt means
Inventor:
Curtis T. Conant
Patented Case
View Patent ↗
Granted: May 3, 1988
Filed: May 23, 1985
Inventor
Curtis T. Conant
Assignee (at issue)
American Magnetics, 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.