Granted Patent
Utility
US 4,934,546 · App. 07/302,906
Tamper evident cap having lift tab on bottom edge
Inventor:
Ross L. Markley
Patented Case
View Patent ↗
Granted: Jun 19, 1990
Filed: Jan 30, 1989
Inventor
Ross L. Markley
Assignee (at issue)
Cap Snap Co.
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.