Granted Patent
Utility
US 4,343,540 · App. 06/235,170
Plotting apparatus and method utilizing encoded optical means
Inventor:
Henry F. Berdat
Patented Case
View Patent ↗
Granted: Aug 10, 1982
Filed: Feb 17, 1981
Inventor
Henry F. Berdat
Assignee (at issue)
The Gerber Scientific Instrument Company
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.