US PATENT SUBCLASS 104 / 107
.~ Two tread

Current as of: June, 1999
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104 /   HD   RAILWAYS

106  DF  TROLLEY RAILS {3}
107.~ Two tread {2}
108  DF  .~.~> Slotted tube
109  DF  .~.~> Integral

DEFINITION

Classification: 104/107

(under subclass 106) Trolley-rails provided with a plurality of tread-surfaces.