Granted Patent
Utility
US 5,212,714 · App. 07/355,089
High speed data interface for land mobile communication system
Inventors:
Mervin L. Grindahl, Philip M. Wala
Patented Case
View Patent ↗
Granted: May 18, 1993
Filed: May 18, 1989
Inventors
Mervin L. Grindahl
Philip M. Wala
Assignee (at issue)
E.F. Johnson 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.