Granted Patent
Utility
US 4,928,837 · App. 07/347,363
Tamper evident closure
Inventor:
Yoram Curiel
Patented Case
View Patent ↗
Granted: May 29, 1990
Filed: May 4, 1989
Inventor
Yoram Curiel
Assignee (at issue)
TSL, Limited Company
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.