A shoe wear out sensor (100,210,310) includes at least one detector (104,312) for sensing a physical metric that changes as a sole of a shoe wears out, a processor (102) configured to process the physical metric over time to determine if the shoe is worn out, and an alarm (106) for informing a user of...http://www.google.fr/patents/US7911339?utm_source=gb-gplus-shareBrevet US7911339 - Shoe wear-out sensor, body-bar sensing system, unitless activity assessment and associated methods
