Granted Patent
Utility
US 5,617,812 · App. 08/683,115
Tamper evident system
Inventors:
Simon N. Balderson, Robert John Whitwood
Patented Case
View Patent ↗
Granted: Apr 8, 1997
Filed: Jul 16, 1996
Inventors
Simon N. Balderson
Robert John Whitwood
Assignee (at issue)
Sealed Air (NZ) Limited
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.