US PATENT SUBCLASS 104 / 109
.~.~ Integral

Current as of: June, 1999
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104 /   HD   RAILWAYS

106  DF  TROLLEY RAILS {3}
107  DF  .~ Two tread {2}
109.~.~ Integral

DEFINITION

Classification: 104/109

(under subclass 107) Trolley-rails which are integral and have tread-surfaces on their opposite sides.