Systems in which secondary clocks function as primary clocks for other secondary

Official title: {Systems in which secondary clocks function as primary clocks for other secondary clocks (synchronisation of independently-driven clocks G04C11/00, setting G04C9/00)}

G04C13/0427 (Systems in which secondary clocks function as primary clocks for other secondary) appears on 0 US grants and 0 published applications in this corpus.