Granted Patent
Utility
US 4,534,542 · App. 06/558,575
Suction control device for aspirator system
Inventor:
Ronald D. Russo
Patented Case
View Patent ↗
Granted: Aug 13, 1985
Filed: Dec 5, 1983
Inventor
Ronald D. Russo
Assignee (at issue)
Superior Plastic Products Corp.
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.