US PATENT SUBCLASS 405 / 198
.~.~ Longitudinally extending projections or recesses

Current as of: June, 1999
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405 /   HD   HYDRAULIC AND EARTH ENGINEERING

195.1  DF  MARINE STRUCTURE OR FABRICATION THEREOF {11}
196  DF  .~ With work deck vertically adjustable relative to floor {4}
198.~.~ Longitudinally extending projections or recesses

DEFINITION

Classification: 405/198

Longitudinally extending projections or recesses:

(under subclass 196) Method or apparatus wherein a plurality of regularly spaced protuberances, indentations, or apertures are arranged along the length of a columnar member and means are provided to co-operate with said protuberances, indentations, or apertures to effect raising or lowering of the platform.