Granted Patent
Utility
US 5,125,897 · App. 07/515,855
Gastrostomy device with one-way valve and cuff pin
Inventors:
David G. Quinn, Erik Andersen, Steven E. Wendland
Patented Case
View Patent ↗
Granted: Jun 30, 1992
Filed: Apr 27, 1990
Inventors
David G. Quinn
Erik Andersen
Steven E. Wendland
Assignee (at issue)
Corpak, 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.