Granted Patent
Utility
US 4,400,818 · App. 06/229,551
Rotary switch simulator
Inventor:
Ira P. Shapiro
Patented Case
View Patent ↗
Granted: Aug 23, 1983
Filed: Jan 29, 1981
Inventor
Ira P. Shapiro
Assignee (at issue)
Burroughs, 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.