Inventor

UCHIDA SEIYA

JP4 patents

Patents

4 patents

US4730306AMar 8, 1988

Conference system

IWATSU ELECTRIC CO LTD47 citations88

US4583221AApr 15, 1986

Synchronization system for key telephone system

IWATSU ELECTRIC CO LTD10 citations71

US4479085AOct 23, 1984

Power source circuit

IWATSU ELECTRIC CO LTD11 citations64

US4726016AFeb 16, 1988

Conference system

IWATSU ELECTRIC CO LTD5 citations60