Granted Patent
Utility
US 4,190,040 · App. 05/921,559
Resealable puncture housing for surgical implantation
Inventor:
Rudolf R. Schulte
Patented Case
View Patent ↗
Granted: Feb 26, 1980
Filed: Jul 3, 1978
Inventor
Rudolf R. Schulte
Assignee (at issue)
American Hospital Supply 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.