Granted Patent
Utility
US 4,554,849 · App. 06/566,901
Method and apparatus for punching holes in polymer tubes
Inventor:
Thomas H. Benham
Patented Case
View Patent ↗
Granted: Nov 26, 1985
Filed: Dec 29, 1983
Inventor
Thomas H. Benham
Assignee (at issue)
MALLINCKRODT LLC
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.