A rubber pad construction is adapted for use in making a shoe sole, a shoe pad, a face layer of a table-tennis paddle, a shell of a ball, etc. The rubber pad construction includes a substrate, and a plurality of first and second protrusions which extend outwardly from one side of the substrate at...http://www.google.fr/patents/US5853844?utm_source=gb-gplus-shareBrevet US5853844 - Rubber pad construction with resilient protrusions
Rubber pad construction with resilient protrusions
