US PATENT SUBCLASS 14 / 9
.~.~ Bowstring

Current as of: June, 1999
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14 /   HD   BRIDGES

3  DF  TRUSS {3}
4  DF  .~ Arrangement {6}
9.~.~ Bowstring {1}
10  DF  .~.~.~> Adjustable

DEFINITION

Classification: 14/9

(under subclass 4) Truss-bridges having the upper member an arc of a circle and the lower member the chord of said arc.