Granted Patent
Utility
US 4,350,157 · App. 06/156,259
Atraumatic blood access device valve
Inventor:
Jack L. Hoffa
Patented Case
View Patent ↗
Granted: Sep 21, 1982
Filed: Jun 3, 1980
Inventor
Jack L. Hoffa
Assignee (at issue)
Bentley 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.