821549-A is referenced by 1 patents.
821,549. Aircraft runways. PALLAVICINO, C. Feb. 27. 1956 [Feb. 26, 1955], No. 5973/56. Class 107 Aircraft runways are constructed of metal elements 4 having depending side flanges some being hooked (41, 44). They are arranged tile fashion or to break joint and are preferably pressed into the ground to form ground anchors.