Granted Patent
Utility
US 4,387,956 · App. 06/271,909
Fiber optic interlock
Inventor:
Charles D. Cline
Patented Case
View Patent ↗
Granted: Jun 14, 1983
Filed: Jun 9, 1981
Inventor
Charles D. Cline
Assignee (at issue)
Rockwell International 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.