Granted Patent
Utility
US 4,336,422 · App. 06/075,341
Toll restrictor
Inventor:
Regis B. Mellon
Patented Case
View Patent ↗
Granted: Jun 22, 1982
Filed: Sep 13, 1979
Inventor
Regis B. Mellon
Assignee (at issue)
Akzona Incorporated
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.