US PATENT SUBCLASS 434 / 227
.~ Keyboard operation (e.g., typing, key punching, etc.)

Current as of: June, 1999
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434 /   HD   EDUCATION AND DEMONSTRATION

219  DF  OCCUPATION {8}
227.~ Keyboard operation (e.g., typing, key punching, etc.) {5}
228  DF  .~.~> Means for selectively illuminating character on simulated keyboard
229  DF  .~.~> Means for selectively rendering key operable or inoperable
230  DF  .~.~> Means for selectively producing sound of character
231  DF  .~.~> Practice keyboard having individually depressible keys {1}
233  DF  .~.~> Means on hand or finger for indicating finger to be used

DEFINITION

Classification: 434/227

Keyboard operation (e.g.., typing, key punching, etc.):

(under subclass 219) Subject matter relating to the proper technique of operating the keyboard of a machine.

SEE OR SEARCH CLASS

84, Music,

465+, and 470+ for teaching keyboard musical instruments.

199, Type Casting, for lino-type machines. 234, Selective Cutting (e.g.., Punching), appropriate subclasses, and particularly

123, for keyboard means in a card or tape punch.

235, Registers, for registers and calculators.

276, Typesetting, appropriate subclasses for machines pertinent to that class. 346, Recorders, appropriate subclasses for recorders.

400, Typewriting Machines,

472+, for a keyboard of a typewriter.