Granted Patent
Utility
US 4,307,272 · App. 06/013,157
Pressure actuated switch
Inventor:
Harold A. Dvorachek
Patented Case
View Patent ↗
Granted: Dec 22, 1981
Filed: Feb 21, 1979
Inventor
Harold A. Dvorachek
Assignee (at issue)
Echlin Manufacturing 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.