US PATENT SUBCLASS 212 / 249
.~.~ Human or animal powered

Current as of: June, 1999
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212 /   HD   TRAVERSING HOISTS

223  DF  HAVING HORIZONTALLY SWINGING BOOM OR BRIDGE {9}
245  DF  .~ And means to swing boom horizontally {3}
249.~.~ Human or animal powered

DEFINITION

Classification: 212/249

Human or animal powered:

(under subclass 245) Apparatus wherein means are provided by which a person or animal may apply a force to swing the boom* horizontally.

SEE OR SEARCH THIS CLASS, SUBCLASS:

241, for a horizontally and vertically swinging boom having means by which a person or animal may swing the boom vertically.

263, for a human or animal powered vertically swinging boom.