US PATENT SUBCLASS 345 / 18
.~.~.~ Up/down counter

Current as of: June, 1999
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345 /   HD   COMPUTER GRAPHICS PROCESSING, OPERATOR INTERFACE PROCESSING, AND SELECTIVE VISUAL DISPLAY SYSTEMS

10  DF  DATA RESPONSIVE CRT DISPLAY CONTROL {10}
13  DF  .~ Data responsive deflection control {4}
16  DF  .~.~ Stroke or vector {2}
18.~.~.~ Up/down counter

DEFINITION

Classification: 345/18

Up/down counter:

(under subclass 16) Subject matter including a means for determining the points of the stroke or vector in incremental steps.

SEE OR SEARCH CLASS

377, Electrical Pulse Counters, Pulse Dividers, or Shift Registers: Circuits and Systems, appropriate subclasses for counters in general.