Granted Patent
Utility
US 4,860,145 · App. 06/786,368
Tap switching protection circuit
Inventor:
August G. Klingbiel
Patented Case
View Patent ↗
Granted: Aug 22, 1989
Filed: Oct 11, 1985
Inventor
August G. Klingbiel
Assignee (at issue)
Oneac 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.