US PATENT SUBCLASS 33 / 427
.~ Square and sliding nonpivotal straightedge(s)

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

403  DF  STRAIGHTEDGE TYPE {16}
427.~ Square and sliding nonpivotal straightedge(s) {1}
428  DF  .~.~> Straightedge bisects right angle of square (i.e., centering square)

DEFINITION

Classification: 33/427

Square and sliding nonpivotal straightedge(s):

(under subclass 403) Subject matter wherein the straightedge can be adjusted along a straight line on the square.