In this study, the propagation phenomena of phase differences under 180 degrees between adjacent oscillators can be observed on coupled oscillators by inductors as a lattice. The phenomenon can be observed in transient states. We call the phenomenon ldquophase-waves.rdquo We explain the propagation and the reflection mechanisms of the phase-waves using frequencies of each oscillator and phase differences between adjacent oscillators. Furthermore, we discover to observe an other wave on the above same circuit. The wave can be observed in steady states. We call the wave ldquophase-inversion wave.rdquo We clarify a region which can be observed the phase-inversion waves.