Granted Patent
Utility
US 4,529,402 · App. 06/582,196
Closed wound suction evacuator with rotary valve
Inventors:
Eugene E. Weilbacher, Dean A. Ransom
Patented Case
View Patent ↗
Granted: Jul 16, 1985
Filed: Feb 21, 1984
Inventors
Eugene E. Weilbacher
Dean A. Ransom
Assignee (at issue)
Snyder Laboratories, 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.