Granted Patent
Utility
US 4,335,418 · App. 06/201,100
Electronic interrupter
Inventor:
Mark W. P. Clement
Patented Case
View Patent ↗
Granted: Jun 15, 1982
Filed: Oct 27, 1980
Inventor
Mark W. P. Clement
Assignee (at issue)
Federal Signal Corporation
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.