Granted Patent
Utility
US 5,573,077 · App. 08/255,334
Acoustic touch position sensor
Inventor:
Terence J. Knowles
Patented Case
View Patent ↗
Granted: Nov 12, 1996
Filed: Jun 7, 1994
Inventor
Terence J. Knowles
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.