Granted Patent
Utility
US 4,308,577 · App. 06/146,648
Base drive circuit
Inventor:
Sandor Mentler
Patented Case
View Patent ↗
Granted: Dec 29, 1981
Filed: May 5, 1980
Inventor
Sandor Mentler
Assignee (at issue)
Burroughs, Inc.
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.