US PATENT SUBCLASS 33 / 481
.~.~ Multiplane

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}
481.~.~ Multiplane

DEFINITION

Classification: 33/481

Multiplane:

(under subclass 474) Subject matter wherein the straightedge device is constructed to ascertain a desired measurement in more than one plane.