A clock synchronization system for synchronizing the performance of a number of clocks (46) so that they run parallel with a reference clock is disclosed. Each clock of this synchronization system includes a counter (52) that indicates the current time and that is sequentially incremented by a counter...http://www.google.de/patents/US5416808?utm_source=gb-gplus-sharePatent US5416808 - Apparatus for synchronizing a plurality of clocks in a simulcast network to a reference clock
