Granted Patent
Utility
US 4,888,581 · App. 07/178,190
Pressure sensitive security system for tracking motion over a surface
Inventor:
John K. Guscott
Patented Case
View Patent ↗
Granted: Dec 19, 1989
Filed: Apr 6, 1988
Inventor
John K. Guscott
Assignee (at issue)
Aritech Corporation
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.