US PATENT SUBCLASS 278 / 74
.~.~.~ Retainers

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.~.~.~ Retainers {2}
75  DF  .~.~.~.~> Pivoted
76  DF  .~.~.~.~> Spring

DEFINITION

Classification: 278/74

Retainers:

(under subclass 73) Subject matter wherein retaining means is provided to maintain the "D" element in the hook.