发明名称 Apparatus for timely controlling the sound characteristic of a signaling means of a voice communication device
摘要 An automatic telephone silencer and volume controller having a microprocessor for storing time and volume information and for timely controlling the sound characteristics of a telephone ringer in accordance with the time and volume information stored. The time and volume information may be entered into the microprocessor by a suitable keyboard. Each time entry has associated with it a volume entry so that the telephone will ring at the prescribed volume from that time until the time denoted by the next time entry.
申请公布号 US4644106(A) 申请公布日期 1987.02.17
申请号 US19850690720 申请日期 1985.01.10
申请人 INVENTA ELECTRONICS CO., LTD. 发明人 YEH, KOU-I
分类号 H04M1/663;H04M19/04;(IPC1-7):H04M1/21 主分类号 H04M1/663
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