A composite transverse wing rib shaped as a multi-layered flat panel comprises a cellular-ribbed structure of intersecting rectlinear ribs whose lengthwise directions are angled in opposite directions at oblique angles to a longitudinal dimension of the wing rib. The ribs have widthwise directions that...http://www.google.de/patents/US5993941?utm_source=gb-gplus-sharePatent US5993941 - Composite transverse wing rib and apparatus for producing flat cellular-ribbed structure thereof
