US PATENT SUBCLASS 212 / 241
.~.~.~.~ 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}
232  DF  .~ And vertically swinging {6}
237  DF  .~.~ Including means to swing boom vertically {2}
239  DF  .~.~.~ Flexible cable {2}
241.~.~.~.~ Human or animal powered

DEFINITION

Classification: 212/241

Human or animal powered:

(under subclass 239) Apparatus wherein means are provided by which a person or animal may apply a force to the strand of flaccid material to swing the boom vertically.

SEE OR SEARCH THIS CLASS, SUBCLASS:

249, for a human- or animal-powered horizontally swinging boom.

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