US PATENT SUBCLASS 33 / 777
.~.~ Inside tube

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

700  DF  DISTANCE MEASURING {13}
772  DF  .~ Of length by rolling contact {7}
777.~.~ Inside tube

DEFINITION

Classification: 33/777

Inside tube:

(under subclass 772) Subject matter wherein the means that bears on the material is within a hollow cylinder or pipe.