Walter Bretschneider: Stitched-down shoe. Cantor and Singer, January 5, 1982: US04308671 (48 worldwide citation)

A stitched-down shoe in which the upper or the upper material has an outwardly-turned edge which is sewn directly to a base. The base has a lateral seam groove extending around the periphery thereof and near the top of the base, and pre-formed stitch holes directed essentially perpendicular to the s ...