US PATENT SUBCLASS 185 / 18
.~ Pivoted disk tread

Current as of: June, 1999
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185 /   HD   MOTORS: SPRING, WEIGHT, OR ANIMAL POWERED

15  DF  ANIMAL POWERED {7}
18.~ Pivoted disk tread

DEFINITION

Classification: 185/18

(under subclass 15) Motors in which the animals tread on pivoted disks.