US PATENT SUBCLASS 236 / 49.4
.~ Pneumatically actuated


Current as of: June, 1999
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236 /   HD   AUTOMATIC TEMPERATURE AND HUMIDITY REGULATION

49.1  DF  VENTILATOR TYPE {4}
49.4.~ Pneumatically actuated


DEFINITION

Classification: 236/49.4

Pneumatically actuated:

(under subclass 49.1) Device wherein the means operates the air flow control device by way of air pressure.