A low cost, remotely resettable wall clock or the like is provided, which is driven by a conventional quartz crystal oscillator system, for example. On a once a day basis, a reset signal is received from a local broadcast station, which serves to reset the clock to a predetermined reset time, typically...http://www.google.co.uk/patents/US5363348?utm_source=gb-gplus-sharePatent US5363348 - High resolution, remotely resettable time clock
