US PATENT SUBCLASS 212 / 350
.~.~ Having bearing means between extensible sections

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

347  DF  BOOM OR MAST {1}
348  DF  .~ Extensible by sliding sections {2}
350.~.~ Having bearing means between extensible sections

DEFINITION

Classification: 212/350

Having bearing means between extensible sections:

(under subclass 348) Subject matter wherein significance is attributed to specific structure of the areas of contact between respective relatively sliding sections of the structural member.

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