Granted Patent
Utility
US 5,731,757 · App. 08/699,619
Portable tracking apparatus for continuous position determination of criminal offenders and victims
Inventor:
Hoyt M. Layson
Patented Case
View Patent ↗
Granted: Mar 24, 1998
Filed: Aug 19, 1996
Inventor
Hoyt M. Layson
Assignee (at issue)
Pro Tech Monitoring, Inc.
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.