Granted Patent
Utility
US 4,460,898 · App. 06/332,984
Four element antenna turnstile tracking system
Inventor:
Robert E. Silinsky
Patented Case
View Patent ↗
Granted: Jul 17, 1984
Filed: Dec 21, 1981
Inventor
Robert E. Silinsky
Assignee (at issue)
Hughes Aircraft 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.