US PATENT SUBCLASS 52 / 47
.~.~ And longitudinal ridge

Current as of: June, 1999
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52 /   HD   STATIC STRUCTURES (E.G., BUILDINGS)

45  DF  RAILROAD CAR ROOF CONSTRUCTION {4}
46  DF  .~ Continuous carline; e.g., discrete coextensive rafter {6}
47.~.~ And longitudinal ridge

DEFINITION

Classification: 52/47

(under subclass 46) Structure associated structurally with a ridge running centrally and longitudinally of the car roof.