US PATENT SUBCLASS 470 / 59
.~.~ Wooden screw


Current as of: June, 1999
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470 /   HD   THREADED, HEADED FASTENER, OR WASHER MAKING: PROCESS AND APPARATUS

57  DF  APPARATUS FOR MAKING EXTERNALLY THREADED FASTENER OR ARTICLE, E.G., SCREW, BOLT, ETC. {2}
58  DF  .~ Screw fastener making {6}
59.~.~ Wooden screw


DEFINITION

Classification: 470/59

Wooden screw:

(under subclass 58) Subject matter wherein the fastener is composed of cellulose extracted from interior part of a tree.