Granted Patent
Utility
US 4,456,897 · App. 06/271,702
Plunger-operated switch unit
Inventors:
Thomas J. Holce, Charles M. Huckins
Patented Case
View Patent ↗
Granted: Jun 26, 1984
Filed: Jun 8, 1981
Inventors
Thomas J. Holce
Charles M. Huckins
Assignee (at issue)
Sentrol, 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.