Granted Patent
Utility
US 5,187,330 · App. 07/745,342
Positional determination
Inventor:
Brian Holcroft
Patented Case
View Patent ↗
Granted: Feb 16, 1993
Filed: Aug 15, 1991
Inventor
Brian Holcroft
Assignee (at issue)
Thorn EMI plc
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.