Granted Patent
Utility
US 4,669,952 · App. 06/735,469
Quiet by-pass vacuum motor
Inventors:
Thomas Forsyth, Leonard J. Kline, Jr., Daniel F. McCauley
Patented Case
View Patent ↗
Granted: Jun 2, 1987
Filed: May 17, 1985
Inventors
Thomas Forsyth
Leonard J. Kline, Jr.
Daniel F. McCauley
Assignee (at issue)
Ametek, 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.