US PATENT SUBCLASS 235 / 88 M
.~.~.~ Mathematics

Current as of: June, 1999
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235 /   HD   REGISTERS

61 R  DF  CALCULATORS {52}
85 R  DF  .~ Tabular {5}
88 R  DF  .~.~ Disk {5}
88 M.~.~.~ Mathematics

Unofficial Alpha Subclasses: R F G M N RC

DEFINITION

Classification: 235/88

(under subclass 85) Tabular calculators having tables placed upon disks which rotate about their centers.