US PATENT SUBCLASS 178 / 19.02
.~.~.~ Acoustical stylus

Current as of: June, 1999
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178 /   HD   TELEGRAPHY

2 R  DF  SYSTEMS {21}
18.01  DF  .~ Position coordinate determination for writing (e.g., writing digitizer pad, stylus, or circuitry) {4}
19.01  DF  .~.~ Writing digitizer stylus {5}
19.02.~.~.~ Acoustical stylus

DEFINITION

Classification: 178/19.02

Acoustical stylus:

(under subclass 19.01) Subject matter wherein the pointing device transmits acoustical signals (e.g., vibration, ultrasonic waves, or the like) to the sensing surface of the tablet.

SEE OR SEARCH THIS CLASS, SUBCLASS:

18.04, for an acoustical writing digitizer pad.

47, for harmonic or vibratory transmission systems and essential accessories.

SEE OR SEARCH CLASS

345, Computer Graphics Processing, Operator Interface Processing, and Selective Visual Display Systems,

179, for a combination of a display device and a stylus. 367, Communications, Electrical: Acoustic Wave Systems and Devices, cross-reference art collection 907 for coordinate determination.