Patent 7780199 was granted and assigned to Orbea S. Coop. on August, 2010 by the United States Patent and Trademark Office.
Bicycle frame, of the type which consist of a diagonal tube (1) of quadrangular section, in which at least in the mid-upper zone (11) of the diagonal tube (1) which faces the bicycle wheel, the outer side (10) of said quadrangular section is concave, and the size (a) of said outer side (10) increases approximately from the upper section (A:A) to the central section (C:C) of the diagonal tube (1).