US PATENT SUBCLASS 238 / 30
.~ Forms

Current as of: June, 1999
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238 /   HD   RAILWAYS: SURFACE TRACK

29  DF  TIES {9}
30.~ Forms {12}
31  DF  .~.~> Jointed {2}
34  DF  .~.~> Detachable ends
35  DF  .~.~> Multiple section
36  DF  .~.~> Vertical sandwich
37  DF  .~.~> Horizontal sandwich
38  DF  .~.~> Twin
39  DF  .~.~> Complementary sliding lock
40  DF  .~.~> Truss {1}
42  DF  .~.~> Stringer ends
43  DF  .~.~> Loop or hook ends
44  DF  .~.~> Spread ends
45  DF  .~.~> Special {4}

DEFINITION

Classification: 238/30

Variations in longitudinal form of railway-ties.

(1) Note. Variations in cross-sections of railway-ties are found in this class, subclasses 54 to 81, inclusive.

SEE OR SEARCH CLASS

428, Stock Material or Miscellaneous Articles,

544+, for nominally claimed metallic track, that is, having some structural description, but insufficient to limit its use to that of a railway track, element, adjunct or material.