Granted Patent
Utility
US 4,522,307 · App. 06/543,334
Child-resistant tamper-evident closure
Inventor:
Gerald Steiner
Patented Case
View Patent ↗
Granted: Jun 11, 1985
Filed: Oct 19, 1983
Inventor
Gerald Steiner
Assignee (at issue)
ANCHOR HOCKING, 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.