Granted Patent
Utility
US 4,517,419 · App. 06/437,973
Cantilever spring telephone hookswitch adapted for printed wiring card mounting
Inventor:
Richard B. Kosten
Patented Case
View Patent ↗
Granted: May 14, 1985
Filed: Nov 1, 1982
Inventor
Richard B. Kosten
Assignee (at issue)
GTE Communication Systems 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.