US PATENT SUBCLASS 235 / 71 A
.~.~ Slide rule tape

Current as of: June, 1999
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235 /   HD   REGISTERS

61 R  DF  CALCULATORS {52}
71 R  DF  .~ Belt {1}
71 A.~.~ Slide rule tape

Unofficial Alpha Subclasses: R A

DEFINITION

Classification: 235/71

(under subclass 61) Calculating-machines wherein movable belts bearing numerals are employed instead of cylinders or disks. Machines wherein belts are employed as devices whereby to operate registering or calculating cylinders, etc., are not classified herein, but are located according to the character of the registering mechanism.