| 发明名称 |
PRIVACY CIRCUIT FOR TELEPHONE |
| 摘要 |
PURPOSE:To improve the privacy performance for a plurality of telephone sets connected paralleley, by inserting non-linear elements and capacitors of small capacitance to the telephone line. |
| 申请公布号 |
JPS5414104(A) |
申请公布日期 |
1979.02.02 |
| 申请号 |
JP19770079550 |
申请日期 |
1977.07.05 |
| 申请人 |
NIPPON TELEGRAPH & TELEPHONE;KANDA TSUSHIN KOGYO KK |
发明人 |
FUJIWARA SHIOKAZU;TAKAGAWA YUUICHIROU;NAGASAKI YOSHIO;SASAI MINORU |
| 分类号 |
H04M1/70;(IPC1-7):04M1/70 |
主分类号 |
H04M1/70 |
| 代理机构 |
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代理人 |
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| 主权项 |
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| 地址 |
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