Granted Patent
Utility
US 4,415,844 · App. 06/230,448
Digital motor speed controller
Inventors:
Charles E. Mendenhall, Michael D. Buckert
Patented Case
View Patent ↗
Granted: Nov 15, 1983
Filed: Feb 9, 1981
Inventors
Charles E. Mendenhall
Michael D. Buckert
Assignee (at issue)
Priam 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.