US PATENT SUBCLASS 277 / 518
.~.~.~ Plural distinct packing boxes

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

345  DF  SEAL BETWEEN RELATIVELY MOVABLE PARTS (I.E., DYNAMIC SEAL) {10}
500  DF  .~ Circumferential contact seal for other than piston {13}
510  DF  .~.~ Contained or compressed by gland member in packing box {10}
518.~.~.~ Plural distinct packing boxes

DEFINITION

Classification: 277/518

Plural distinct packing boxes:

(under subclass 510) Seal for the gland and packing box comprising distinguishable sealing chambers, seals, and glands.