Granted Patent
Utility
US 4,396,239 · App. 06/242,224
Interlock mechanism
Inventor:
Tom Wissman
Patented Case
View Patent ↗
Granted: Aug 2, 1983
Filed: Mar 10, 1981
Inventor
Tom Wissman
Assignee (at issue)
PARADYNE 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.