US PATENT SUBCLASS 235 / 84
.~.~.~ Slide rules

Current as of: June, 1999
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235 /   HD   REGISTERS

61 R  DF  CALCULATORS {52}
77  DF  .~ Single axis {3}
83  DF  .~.~ Disk; dial and hand {1}
84.~.~.~ Slide rules

DEFINITION

Classification: 235/84

(under subclass 83) Subject matter comprising slide rules, as defined in subclass 70 wherein the base and the slides instead of being straight are circular.

SEE OR SEARCH THIS CLASS, SUBCLASS:

70, and 79.5, for other types of slide rules.