Granted Patent
Utility
US 5,017,880 · App. 07/469,647
Varying operational frequency control circuit apparatus with noise minimizing feature
Inventors:
John M. Dugan, Gordon W. Ries
Patented Case
View Patent ↗
Granted: May 21, 1991
Filed: Jan 24, 1990
Inventors
John M. Dugan
Gordon W. Ries
Assignee (at issue)
Rockwell International 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.