发明授权
EP0346243B1 Dial signal generator for generating dial pulse signal and dual tone multi-frequency signal 失效
用于产生Wählimpulssignalen和双音多频信号中选择信号发生器

  • 专利标题: Dial signal generator for generating dial pulse signal and dual tone multi-frequency signal
  • 专利标题(中): 用于产生Wählimpulssignalen和双音多频信号中选择信号发生器
  • 申请号: EP89401616.1
    申请日: 1989-06-09
  • 公开(公告)号: EP0346243B1
    公开(公告)日: 1996-09-11
  • 发明人: Hasegawa, Takashi
  • 申请人: FUJITSU LIMITED
  • 申请人地址: 1015, Kamikodanaka, Nakahara-ku Kawasaki-shi, Kanagawa 211 JP
  • 专利权人: FUJITSU LIMITED
  • 当前专利权人: FUJITSU LIMITED
  • 当前专利权人地址: 1015, Kamikodanaka, Nakahara-ku Kawasaki-shi, Kanagawa 211 JP
  • 代理机构: Joly, Jean-Jacques
  • 优先权: JP143138/88 19880610
  • 主分类号: H04M1/50
  • IPC分类号: H04M1/50 H04M1/30 H03M7/22
Dial signal generator for generating dial pulse signal and dual tone multi-frequency signal
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