US PATENT SUBCLASS 114 / 211
VENTILATION

Current as of: June, 1999
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114 /   HD   SHIPS

211VENTILATION {1}
212  DF  .~> Valves

DEFINITION

Classification: 114/211

Ventilating devices specific to ships and involving the structure of the ship.

SEE OR SEARCH CLASS

454, Ventilation, for ventilation in general.