Granted Patent
Utility
US 4,976,186 · App. 07/287,097
Control system for mechanically adjustable speed motor drives
Inventors:
Keith L. Carmichael, James F. Runyan
Patented Case
View Patent ↗
Granted: Dec 11, 1990
Filed: Dec 20, 1988
Inventors
Keith L. Carmichael
James F. Runyan
Assignee (at issue)
Reliance Electric Limited
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.