US PATENT SUBCLASS 48 / 23
.~.~.~ Series

Current as of: June, 1999
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48 /   HD   GAS: HEATING AND ILLUMINATING

*  DD  ACETYLENE {5}
*  DD  .~ Generators {5}
4  DF  .~.~ Water feed {15}
23.~.~.~ Series

DEFINITION

Classification: 48/23

Structures in which two or more generators are employed and which are used successively.