Granted Patent
Utility
US 4,363,089 · App. 06/198,399
Inverter
Inventor:
Franklin D. Wisman
Patented Case
View Patent ↗
Granted: Dec 7, 1982
Filed: Oct 20, 1980
Inventor
Franklin D. Wisman
Assignee (at issue)
T. B. Wood's Sons Company
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.