Granted Patent
Utility
US 4,002,879 · App. 05/607,894
Double column leaf spring push-button switch
Inventor:
Dewey M. Sims, Jr.
Patented Case
View Patent ↗
Granted: Jan 11, 1977
Filed: Aug 26, 1975
Inventor
Dewey M. Sims, Jr.
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.