In one embodiment, an apparatus includes a mount, a housing, and a sensor. The mount is adapted to be disposed at least partially underneath a shoelace of a shoe, and the housing is adapted to be releasably attached to the mount. There is a tongue on one of the mount and the housing and a groove on the...http://www.google.de/patents/US20020152645?utm_source=gb-gplus-sharePatent US20020152645 - Detachable foot mount for electronic device
