Granted Patent
Utility
US 4,528,544 · App. 06/530,936
Control apparatus for variable speed reversible motor
Inventor:
Richard W. Mattson
Patented Case
View Patent ↗
Granted: Jul 9, 1985
Filed: Sep 12, 1983
Inventor
Richard W. Mattson
Assignee (at issue)
ALLIED CONSULTING, 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.