Granted Patent
Utility
US 4,396,832 · App. 06/307,796
Pattern tracer using digital logic
Inventor:
John Henderson
Patented Case
View Patent ↗
Granted: Aug 2, 1983
Filed: Oct 2, 1981
Inventor
John Henderson
Assignee (at issue)
Westinghouse Canada 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.