US PATENT SUBCLASS 235 / 79.5
.~.~.~ Slide rules

Current as of: June, 1999
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235 /   HD   REGISTERS

61 R  DF  CALCULATORS {52}
77  DF  .~ Single axis {3}
79  DF  .~.~ Cylinder {3}
79.5.~.~.~ Slide rules

DEFINITION

Classification: 235/79.5

(under subclass 79) Calculating devices wherein two or more relatively movable cylindrical members are so graduated, usually logarithmically according to the elements of some mathematical formula, that by placing one in proper relation to another problems involving such formula may be solved.

SEE OR SEARCH THIS CLASS, SUBCLASS:

70, for bar slide rules.

84, for disk slide rules.