A pad of homogeneous material has a closed, substantially smooth surface. It is age-resistant, wear-resistant and gentle on the skin. It can be permanently connected to the material used for spectacle frames, made of translucent material and made with a lustrous surface. It has a Shore D hardness of...http://www.google.fr/patents/US4243306?utm_source=gb-gplus-shareBrevet US4243306 - Pad device
