US PATENT SUBCLASS 33 / 480
.~.~ Try 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}
480.~.~ Try square

DEFINITION

Classification: 33/480

Try square:

(under subclass 474) Subject matter comprising two straightedges conjointly secured at a 90 deg. angle for the purpose of ascertaining whether a piece of work is at a true 90 deg. angle.