US PATENT SUBCLASS 212 / 311
.~.~.~ Plural booms

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

307  DF  SHIP MOUNTED OR FLOATING (E.G., A CRANE FIXED TO A PLATFORM ADAPTED TO FLOAT) {2}
309  DF  .~ Having horizontally and vertically swinging boom {1}
310  DF  .~.~ Cable actuated horizontally and vertically {1}
311.~.~.~ Plural booms

DEFINITION

Classification: 212/311

Plural booms:

(under subclass 310) Subject matter including additional cable-actuated swiveled booms* carried on the marine vessel or platform.

SEE OR SEARCH THIS CLASS, SUBCLASS:

233, for other apparatus having a plurality of horizontally and vertically swinging booms.