US PATENT SUBCLASS 439 / 669
.~.~.~.~ Plug having cylindrical or annular contacts of substantially the same diameter (e.g., jack-type plug)

Current as of: June, 1999
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439 /   HD   ELECTRICAL CONNECTORS

625  DF  WITH INSULATION OTHER THAN CONDUCTOR SHEATH {10}
626  DF  .~ Plural-contact coupling part {7}
660  DF  .~.~ Plural-contact coupling part comprises receptacle or plug {12}
668  DF  .~.~.~ Having only push-pull-engaging contacts spaced along longitudinal axis of engagement (e.g., jack-type receptacle or plug) {1}
669.~.~.~.~ Plug having cylindrical or annular contacts of substantially the same diameter (e.g., jack-type plug)

DEFINITION

Classification: 439/669

Plug having cylindrical or annular contacts of substantially the same diameter (e.g.., jack-type plug):

(under subclass 668) Coupling part in the form of a plug, and wherein all of the contacts and the intervening material electrically insulating each of the contacts from one another together form a receptacle-receiving male part which is cylindrical or rodlike in structure.