US PATENT SUBCLASS 114 / 138
.~ Vertical drop

Current as of: June, 1999
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114 /   HD   SHIPS

127  DF  CENTERBOARDS {5}
138.~ Vertical drop {1}
139  DF  .~.~> Sectional

DEFINITION

Classification: 114/138

Centerboards that are adapted to be raised or lowered vertically, both ends being adjustable at will either separately or simultaneously, and in most cases the centerboard is moved as a whole and not merely one end.