US PATENT SUBCLASS 434 / 179
.~.~.~ Speed

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

156  DF  LANGUAGE {6}
167  DF  .~ Spelling, phonics, word recognition, or sentence formation {8}
178  DF  .~.~ Reading {2}
179.~.~.~ Speed {4}
180  DF  .~.~.~.~> Projected image of reading matter
181  DF  .~.~.~.~> Apertured mask moved past reading matter carrier
182  DF  .~.~.~.~> Reading matter carrier moved past viewing position
183  DF  .~.~.~.~> Pacer moved down reading matter carrier

DEFINITION

Classification: 434/179

Speed:

(under subclass 178) Subject matter relating to devices used

to train a person to read rapidly.

SEE OR SEARCH CLASS

351, Optics: Eye Examining, Vision Testing and Correcting,

237+, for tachistoscope type vision testing apparatus. See also (1) Note under this subclass for the distinction between the tachistoscope type instruments as classified in Classes 351 and 434.