Granted Patent
Utility
US 4,381,430 · App. 06/301,720
Coin operated timing mechanism
Inventors:
Steven W. Smock, George W. Adams
Patented Case
View Patent ↗
Granted: Apr 26, 1983
Filed: Sep 14, 1981
Inventors
Steven W. Smock
George W. Adams
Assignee (at issue)
Emhart Industries, 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.