US PATENT SUBCLASS 104 / 52
.~ Smoke jacks

Current as of: June, 1999
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104 /   HD   RAILWAYS

51  DF  LOCOMOTIVE SHED FIXTURES {1}
52.~ Smoke jacks

DEFINITION

Classification: 104/52

(under subclass 51) Smoke removers for use in roundhouses and train sheds over locomotive smoke stacks. They may or may not be provided with means for producing an artificial draft.