US PATENT SUBCLASS 235 / 69
.~ Bar

Current as of: June, 1999
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235 /   HD   REGISTERS

61 R  DF  CALCULATORS {52}
69.~ Bar {1}
70 R  DF  .~.~> Slide rules {4}

DEFINITION

Classification: 235/69

(under subclass 61) Calculating devices wherein a bar or bars bearing numerals are employed instead of disks or cylinders.