US PATENT SUBCLASS 174 / 77 S
.~.~.~.~ Spark plugs

Current as of: June, 1999
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174 /   HD   ELECTRICITY: CONDUCTORS AND INSULATORS

68.1  DF  CONDUITS, CABLES OR CONDUCTORS {15}
70 R  DF  .~ Combined {8}
74 R  DF  .~.~ With end structure {10}
77 R  DF  .~.~.~ Sealing {1}
77 S.~.~.~.~ Spark plugs

Unofficial Alpha Subclasses: R S

DEFINITION

Classification: 174/77

(under subclass 74) Structures having means providing a tight seal between the end structure and the conductor element passing therethrough to the exterior thereof.