US PATENT SUBCLASS 122 / 235.18
.~ Having seals

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

235.11  DF  WATER TUBE {52}
235.18.~ Having seals

DEFINITION

Classification: 122/235.18

Having seals:

(under subclass 235.11) Devices having means to make the water tubes vapor tight.