US PATENT SUBCLASS 429 / 83
.~.~ Separate ventilating inlet and exhaust openings

Current as of: June, 1999
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429 /   HD   CHEMISTRY: ELECTRICAL CURRENT PRODUCING APPARATUS, PRODUCT, AND PROCESS

72  DF  HAVING SPECIFIED VENTING, FEEDING OR CIRCULATION STRUCTURE (OTHER THAN FEEDING OR FILLING FOR ACTIVATING DEFERRED ACTION-TYPE BATTERY) {5}
82  DF  .~ Venting structure {5}
83.~.~ Separate ventilating inlet and exhaust openings

DEFINITION

Classification: 429/83

(under subclass 82) Apparatus having different opening for ingress and egress of a fluid.