Granted Patent
Utility
US 4,481,449 · App. 06/436,904
Power fail servo system
Inventor:
David R. Rodal
Patented Case
View Patent ↗
Granted: Nov 6, 1984
Filed: Oct 27, 1982
Inventor
David R. Rodal
Assignee (at issue)
Ampex 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.