Granted Patent
Utility
US 4,130,220 · App. 05/803,520
Tamperproof cover
Inventor:
Robert A. McKirnan
Patented Case
View Patent ↗
Granted: Dec 19, 1978
Filed: Jun 6, 1977
Inventor
Robert A. McKirnan
Assignee (at issue)
Knight Engineering & Molding Co.
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.