US PATENT SUBCLASS 251 / 358
.~ Reinforced flexible material


Current as of: June, 1999
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251 /   HD   VALVES AND VALVE ACTUATION

356  DF  VALVE {5}
358.~ Reinforced flexible material


DEFINITION

Classification: 251/358

(under subclass 356) Subject matter comprising valves made of resilient material which are either internally or externally stiffened or otherwise reinforced by a diverse material.