US PATENT SUBCLASS 104 / 138.1
TUBULAR WAY

Current as of: June, 1999
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104 /   HD   RAILWAYS

138.1TUBULAR WAY {1}
138.2  DF  .~> Internal service device

DEFINITION

Classification: 104/138.1

TUBULAR WAY:

(under the class definition) Railway having an enclosed tubular form.