US PATENT SUBCLASS 414 / 218
.~ Including screw conveyor
Current as of:
June, 1999
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414 /
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MATERIAL OR ARTICLE HANDLING
217
DF
APPARATUS FOR MOVING MATERIAL BETWEEN ZONES HAVING DIFFERENT PRESSURES AND INHIBITING CHANGE IN PRESSURE GRADIENT THEREBETWEEN
{3}
218
.~ Including screw conveyor
DEFINITION
Classification: 414/218
Including screw conveyor:
(under subclass 217) Apparatus wherein the moving and charge-inhibiting means includes a screw conveyor.
