Granted Patent
Utility
US 5,669,061 · App. 08/292,856
Automatic cellular phone tracking
Inventor:
John F. Schipper
Patented Case
View Patent ↗
Granted: Sep 16, 1997
Filed: Aug 19, 1994
Inventor
John F. Schipper
Assignee (at issue)
Trimble Navigation Limited
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.