US PATENT SUBCLASS 261 / 135
.~ With indicator or tester

Current as of: June, 1999
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261 /   HD   GAS AND LIQUID CONTACT APPARATUS

127  DF  WITH EXTERNAL SUPPLY OR REMOVAL OF HEAT {14}
135.~ With indicator or tester

DEFINITION

Classification: 261/135

(under subclass 127) Apparatus provided with an indicating or testing means.