US PATENT SUBCLASS 104 / 108
.~.~ Slotted tube

Current as of: June, 1999
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104 /   HD   RAILWAYS

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

DEFINITION

Classification: 104/108

(under subclass 107) Trolley-rails of slotted-tube form, in which the interior surfaces of the opposed slot edges form the tread-surfaces.