Telephone system and bell sound detecting method thereof
KUDO; TAKAHIRO, SHIMIZU; KAZUHIKO, OHASHI; SUSUMI, MIN; ZHAO, LIPP; RONALD LEE, ODAGIRI; TAKASHI, OHNO; HIROKI
Year of Publication 26.05.1998
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Year of Publication 26.05.1998
Patent
Telephone system
EHARA; MAKOTO, KUDO; TAKAHIRO, SHIMIZU; KAZUHIKO, OHASHI; SUSUMI, MIN; ZHAO, LIPP; RONALD LEE, KANEDA; ATSUSHI, ODAGIRI; TAKASHI, OHNO; HIROKI
Year of Publication 24.03.1998
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Year of Publication 24.03.1998
Patent