US PATENT SUBCLASS 34 / 89.2
.~.~ With ruler

Current as of: June, 1999
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34 /   HD   DRYING AND GAS OR VAPOR CONTACT WITH SOLIDS

523  DF  APPARATUS {40}
89.1  DF  .~ Blotting means combined with means for purpose other than drying {1}
89.2.~.~ With ruler

DEFINITION

Classification: 34/89.2

(under subclass 89.1) Apparatus wherein the other purpose means is a geometrical instrument of the straightedge type.