Granted Patent
Utility
US 4,290,101 · App. 06/109,128
N Phase digital inverter
Inventor:
Odo Hergenhan
Patented Case
View Patent ↗
Granted: Sep 15, 1981
Filed: Dec 31, 1979
Inventor
Odo Hergenhan
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.