Granted Patent
Utility
US 4,633,152 · App. 06/676,038
Direct current motor controller
Inventor:
Aaron V. Farr
Patented Case
View Patent ↗
Granted: Dec 30, 1986
Filed: Nov 29, 1984
Inventor
Aaron V. Farr
Assignee (at issue)
Abex 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.