Invention Grant
- Patent Title: Disconnect control of telephone answering and message recording devices
- Patent Title (中): 断开电话应答和消息录制设备的控制
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Application No.: US51586855Application Date: 1955-06-16
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Publication No.: US2912504APublication Date: 1959-11-10
- Inventor: DAGNALL JR CLARENCE H , MILLER CHARLES G
- Applicant: BELL TELEPHONE LABOR INC
- Assignee: Nokia Bell Labs
- Current Assignee: Nokia Bell Labs
- Priority: US51586855 1955-06-16
- Main IPC: H04M1/654
- IPC: H04M1/654
Information query
