US PATENT SUBCLASS 33 / 479
.~.~ T-square

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

403  DF  STRAIGHTEDGE TYPE {16}
474  DF  .~ Plural straightedges nonadjustably fixed at right angles (e.g., T-square, triangles, squares) {7}
479.~.~ T-square

DEFINITION

Classification: 33/479

T-square:

(under subclass 474) Subject matter comprising a headpiece and a straightedge secured to the headpiece at substantially its median point at an angle of 90 deg., the straightedge being designed to project beyond the headpiece.