Granted Patent
Utility
US 4,729,488 · App. 06/896,283
Tamper-evident cover for threaded neck
Inventor:
Joseph J. Bullock, III
Patented Case
View Patent ↗
Granted: Mar 8, 1988
Filed: Aug 14, 1986
Inventor
Joseph J. Bullock, III
Assignee (at issue)
Bankers Trust Corporation
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.