Granted Patent
Utility
US 5,042,653 · App. 07/569,338
Tamper proof package
Inventor:
Jacob L. Ems
Patented Case
View Patent ↗
Granted: Aug 27, 1991
Filed: Aug 20, 1990
Inventor
Jacob L. Ems
Assignee (at issue)
Brown & Williamson Tobacco 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.