US PATENT SUBCLASS 33 / 31
.~.~.~ Right-angle guides

Current as of: June, 1999
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33 /   HD   GEOMETRICAL INSTRUMENTS

18.1  DF  SCRIBER {10}
27.01  DF  .~ Curved line {13}
30.1  DF  .~.~ Ellipsograph {7}
31.~.~.~ Right-angle guides

DEFINITION

Classification: 33/31

(under subclass 30) Devices comprising two guides at right angles to each other and a scribing member having means to engage the guides.