US PATENT SUBCLASS 33 / 449
.~.~ By rollers

Current as of: June, 1999
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403  DF  STRAIGHTEDGE TYPE {16}
448  DF  .~ With means for moving straightedge over a surface {2}
449.~.~ By rollers

DEFINITION

Classification: 33/449

By rollers:

(under subclass 448) Subject matter wherein the means for moving the straightedge includes rotatable cylindrical supports.