Granted Patent
Utility
US 5,209,653 · App. 07/822,408
Vacuum pump
Inventors:
Gary P. Murray, Harold E. Lyons, Richard Parks
Patented Case
View Patent ↗
Granted: May 11, 1993
Filed: Jan 17, 1992
Inventors
Gary P. Murray
Harold E. Lyons
Richard Parks
Assignee (at issue)
SPX 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.