US PATENT SUBCLASS 292 / 313
.~.~.~ Hard and soft metal

Current as of: June, 1999
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292 /   HD   CLOSURE FASTENERS

307 R  DF  SEALS {14}
308  DF  .~ Compressible disk {3}
311  DF  .~.~ Multiple {2}
313.~.~.~ Hard and soft metal

DEFINITION

Classification: 292/313

(under subclass 311) Devices having a plurality of hard and soft metal disks.