Frank B Griswold: Instep protector for safety shoes. Shanley O Neil and Baker, November 4, 1980: US04231170 (176 worldwide citation)

A safety shoe instep guard of compound curvature conforming generally to the shape of the human instep is constructed as an integral part of the shoe or secured to the shoe adjacent at least the lower end of the guard and extends upwardly from the region of the toes. The guard includes a plurality o ...