Granted Patent
Utility
US 5,374,881 · App. 07/981,164
Electric motor controller
Inventors:
Stephen F. Post, Warren J. Vinzant, Scott Bowman, George L. Ackerson
Patented Case
View Patent ↗
Granted: Dec 20, 1994
Filed: Nov 24, 1992
Inventors
Stephen F. Post
Warren J. Vinzant
Scott Bowman
George L. Ackerson
Assignee (at issue)
Curtis Instruments, 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.