US PATENT SUBCLASS 238 / 92
.~.~.~.~.~ Crosstied
Current as of:
June, 1999
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238 /
HD
RAILWAYS: SURFACE TRACK
29
DF
TIES
{9}
83
DF
.~ Nonmetallic {1}
84
DF
.~.~ Plastic compound {2}
85
DF
.~.~.~ Internal reinforcements {8}
91
DF
.~.~.~.~ Rods {1}
92
.~.~.~.~.~ Crosstied
DEFINITION
Classification: 238/92
(under subclass 91) except that the rods or bars are cross-connected by small frames or wire-tied.