US PATENT SUBCLASS 277 / FOR 155
.~.~ Exposed coil spring (277/153)


Current as of: June, 1999
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277 /   HD   SEAL FOR A JOINT OR JUNCTURE

FOR 140  DF  WITH DISTINCT RADIALLY ACTING BIAS(277/138) {16}
FOR 154  DF  .~ Axial lip or boss (277/152) {1}
FOR 155.~.~ Exposed coil spring (277/153)


DEFINITION

Classification: 277/FOR.155

Foreign art collections wherein the bias means is a coil spring exposed throughout at least a portion of its periphery.