US PATENT SUBCLASS 411 / 368
.~.~ Having washer

Current as of: June, 1999
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411 /   HD   EXPANDED, THREADED, DRIVEN, HEADED, TOOL-DEFORMED, OR LOCKED-THREADED FASTENER

337  DF  HEADED FASTENER ELEMENT WITH NUT, WASHER, SECURING MEANS OR CAP {12}
366.1  DD  .~ Headed bolt or screw with threads and complementary nut {4}
368.~.~ Having washer {1}
369  DF  .~.~.~> Including sealing means {1}

DEFINITION

Classification: 411/368

Having washer:

(under subclass 366.1) Subject matter further provided with a perforated disk.

SEE OR SEARCH THIS CLASS, SUBCLASS:

531+, for washers, per se.