The invention relates to all forms of footwear and orthotics, as well as any other products benefiting from increased flexibility, better resistance to shock and shear forces, and stable support. More specifically, the invention incorporates a unitary integral component with at least one internal (or...http://www.google.fr/patents/US8141276?utm_source=gb-gplus-shareBrevet US8141276 - Devices with an internal flexibility slit, including for footwear
Devices with an internal flexibility slit, including for footwear
