Granted Patent
Utility
US 4,259,845 · App. 06/075,043
Logic control system for inverter-driven motor
Inventor:
Dean K. Norbeck
Patented Case
View Patent ↗
Granted: Apr 7, 1981
Filed: Sep 12, 1979
Inventor
Dean K. Norbeck
Assignee (at issue)
BorgWarner 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.