Granted Patent
Utility
US 4,993,571 · App. 07/407,398
Tamper-evident cap
Inventor:
Vincent N. Conti
Patented Case
View Patent ↗
Granted: Feb 19, 1991
Filed: Sep 14, 1989
Inventor
Vincent N. Conti
Assignee (at issue)
American Safety Closure 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.