Granted Patent
Utility
US 5,260,521 · App. 07/898,458
Acoustic touch position sensor using shear wave propagation
Inventor:
Terence J. Knowles
Patented Case
View Patent ↗
Granted: Nov 9, 1993
Filed: Jun 15, 1992
Inventor
Terence J. Knowles
Assignee (at issue)
Exzec, 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.