US PATENT SUBCLASS 178 / 18.01
.~ Position coordinate determination for writing (e.g., writing digitizer pad, stylus, or circuitry)

Current as of: June, 1999
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178 /   HD   TELEGRAPHY

2 R  DF  SYSTEMS {21}
18.01.~ Position coordinate determination for writing (e.g., writing digitizer pad, stylus, or circuitry) {4}
18.02  DF  .~.~> Error correction
18.03  DF  .~.~> Writing digitizer pad {6}
19.01  DF  .~.~> Writing digitizer stylus {5}
20.01  DF  .~.~> Writing digitizer circuit {3}

DEFINITION

Classification: 178/18.01

Position coordinate determination for writing (e.g., writing

digitizer pad, stylus, or circuitry):

(under subclass 2) Subject matter wherein X, Y coordinates of a designed writing pattern such as a graph or a character inputted by an operator manipulable pointing device (e.g., stylus or the like) or by an operator directly touching a sensing surface of a tablet (e.g., digitizing pad) are defined.

(1) Note. Included here is a writing digitizer pad, a stylus, or circuitry for position coordinate determination without a display device claimed..

SEE OR SEARCH THIS CLASS, SUBCLASS:

18.03, for a writing digitizer pad for position coordinate determination.

19.01, for a writing digitizer stylus for position coordinate determination.

20.01, for a writing digitizer circuit for position coordinate determination.

SEE OR SEARCH CLASS 200, Electricity: Circuit Makers and Breakers,

512+, for a membrane-type solid contact relating to a switch of a touchpad.

340, Communications: Electrical,

407.1, for a tactual indicator.

341, Coded Data Generation or Conversion,

5, for X - Y coordinate determination in a digital pattern reading-type converter and subclasses 20+ for bodily actuated code generators in which an operator makes physical contact to control the transmission or generation of a coded set of pulses.

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

173+, for a combination of a display device and a writing digitizer pad, a stylus, or circuitry for position coordinate determination.

364, Electrical Computers and Data Processing Systems,

709.01+, for an electric digital calculating computer using specialized input.

901, Robots, 33, for a tactile sensor.