Granted Patent
Utility
US 4,863,453 · App. 07/136,698
Sterile closure device
Inventors:
Richard A. Berger, Richard A. Burkholder
Patented Case
View Patent ↗
Granted: Sep 5, 1989
Filed: Dec 22, 1987
Inventors
Richard A. Berger
Richard A. Burkholder
Assignee (at issue)
Sherwood Medical Company
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.