US PATENT SUBCLASS 59 / 79.2
.~.~ Coil spring


Current as of: June, 1999
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59 /   HD   CHAIN, STAPLE, AND HORSESHOE MAKING

78  DF  CHAINS {7}
79.1  DF  .~ Elastic {2}
79.2.~.~ Coil spring


DEFINITION

Classification: 59/79.2

Coil spring:

(under subclass 79.1) Chains comprising expansible chain linkages which are biased to retract by a continuous coil spring passing through a plurality of links.