Granted Patent
Utility
US 4,490,655 · App. 06/425,012
Bi-directional driver system for electrical load
Inventor:
Alan S. Feldman
Patented Case
View Patent ↗
Granted: Dec 25, 1984
Filed: Sep 27, 1982
Inventor
Alan S. Feldman
Assignee (at issue)
Sperry Corp.
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.