US PATENT SUBCLASS 122 / 512
TUBE SHEETS

Current as of: June, 1999
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122 /   HD   LIQUID HEATERS AND VAPORIZERS

512TUBE SHEETS

DEFINITION

Classification: 122/512

(under the class definition) Subject matter relating to structure of the tube sheet for boilers not of general application.

SEE OR SEARCH THIS CLASS, SUBCLASS:

365, for drums and couplings.

511, for tubes and connectors.