US PATENT SUBCLASS 351 / 147
.~.~.~ With serrated interengaging parts

Current as of: June, 1999
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351 /   HD   OPTICS: EYE EXAMINING, VISION TESTING AND CORRECTING

41  DF  SPECTACLES AND EYEGLASSES {29}
140  DF  .~ Connectors {3}
142  DF  .~.~ Strap type {8}
147.~.~.~ With serrated interengaging parts

DEFINITION

Classification: 351/147

(under subclass 142) Subject matter wherein strap arms and screw heads are provided with serrations for interlocking engagement to prevent loosening of the interlocked members.