Granted Patent
Utility
US 4,656,346 · App. 06/721,384
System for optically reading and annotating text on a data card
Inventor:
Jerome Drexler
Patented Case
View Patent ↗
Granted: Apr 7, 1987
Filed: Apr 9, 1985
Inventor
Jerome Drexler
Assignee (at issue)
Drexler Technology Corporation
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.