US PATENT SUBCLASS 278 / 76
.~.~.~.~ Spring

Current as of: June, 1999
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278 /   HD   LAND VEHICLES: ANIMAL DRAFT APPLIANCES

52  DF  THILL COUPLINGS {10}
72  DF  .~ D-head type {2}
73  DF  .~.~ Cooperating hook {1}
74  DF  .~.~.~ Retainers {2}
76.~.~.~.~ Spring

DEFINITION

Classification: 278/76

Spring:

(under subclass 74) Subject matter wherein the retaining member is a spring.