Granted Patent
Utility
US 4,784,642 · App. 06/916,342
Meterless drainage device with suction control
Inventors:
Frederick A. Everett, Jr., Quinton Farrar
Patented Case
View Patent ↗
Granted: Nov 15, 1988
Filed: Oct 7, 1986
Inventors
Frederick A. Everett, Jr.
Quinton Farrar
Assignee (at issue)
Pfizer Hospital Products Group, 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.