US PATENT SUBCLASS 278 / 90
WHIFFLETREES

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

90WHIFFLETREES {5}
91  DF  .~> Resilient
92  DF  .~> Metallic {1}
94  DF  .~> Trussed
95  DF  .~> Connections {3}
102  DF  .~> Trace and whiffletree connections {4}

DEFINITION

Classification: 278/90

WHIFFLETREES:

(under the class definition) Subject matter including patents relating to whiffletrees and to their connections to the pole, thills, or forward part of a vehicle, unless the invention is such as falls under the definition of draft equalizers.