US PATENT SUBCLASS 277 / FOR 112
.~ Unidirectional movement (277/114)


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277 /   HD   SEAL FOR A JOINT OR JUNCTURE

FOR 100  DF  RADIALLY CONTAINED PACKING WITH AXIALLY ACTING FOLLOWER (277/102) {15}
FOR 112.~ Unidirectional movement (277/114)


DEFINITION

Classification: 277/FOR.112

Foreign art collections wherein the follower is provided with means preventing retrograde movement thereof.