US PATENT SUBCLASS 277 / FOR 163
.~.~.~ Polygonal (277/161)

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 159  DF  .~ Periphery engaging spring (277/157) {3}
FOR 160  DF  .~.~ Incompatible shapes (277/158) {3}
FOR 163.~.~.~ Polygonal (277/161)

DEFINITION

Classification: 277/FOR.163

Foreign art collections wherein the spring is of polygonal shape.