US PATENT SUBCLASS 434 / 202
.~.~ Keyboard or like manually manipulated array (e.g., slides, levers, etc.)

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

188  DF  MATHEMATICS {4}
191  DF  .~ Arithmetic {17}
202.~.~ Keyboard or like manually manipulated array (e.g., slides, levers, etc.)

DEFINITION

Classification: 434/202

Keyboard or like manually manipulated array (e.g.., slides, levers, etc.):

(under subclass 191) Subject matter including an assemblage of systematically arranged keys, slidable or turntable members, or the like by means of which a machine is caused to function.