Inventor
IZUMI KAZUTO
4 patents
Patents
4 patentsUS4051332ASep 27, 1977
Multiplex digital echo suppression system
NIPPON TELEGRAPH & TELEPHONE23 citations80
US4004140AJan 18, 1977
Digital attenuator
NIPPON TELEGRAPH & TELEPHONE21 citations80
US4118785AOct 3, 1978
Method and apparatus for digital attenuation by pattern shifting
NIPPON TELEGRAPH & TELEPHONE11 citations71
US4181970AJan 1, 1980
Digital attenuator for compressed PCM signals
NIPPON TELEGRAPH & TELEPHONE6 citations60