US PATENT SUBCLASS 235 / 67
.~ Spiral

Current as of: June, 1999
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235 /   HD   REGISTERS

61 R  DF  CALCULATORS {52}
67.~ Spiral

DEFINITION

Classification: 235/67

(under subclass 61) Subject matter comprising adding-machines wherein the numbers are arranged spirally, either around the surface of a cylinder or upon the face of a disk, there ordinarily being a pointer or its equivalent that travels in cooperation with the cylinder or disk in order to indicate the proper figure or number.

SEE OR SEARCH THIS CLASS, SUBCLASS:

107, for spiral registers.