US PATENT SUBCLASS 180 / 13
.~.~ Single wheel

Current as of: June, 1999
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180 /   HD   MOTOR VEHICLES

11  DF  MOTOR-CARRYING ATTACHMENTS {1}
12  DF  .~ Driven steering wheel type {1}
13.~.~ Single wheel

DEFINITION

Classification: 180/13

(under subclass 12) Frames having a single wheel supporting the frame.