Invention Grant
- Patent Title: Emergency reporting alarm equipment for telephone stations
- Patent Title (中): 紧急报警电话报警设备
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Application No.: US7178260Application Date: 1960-11-25
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Publication No.: US3206551APublication Date: 1965-09-14
- Inventor: CROWSON FRED B , MICHEL WALTER S
- Applicant: BELL TELEPHONE LABOR INC
- Assignee: Nokia Bell Labs
- Current Assignee: Nokia Bell Labs
- Priority: US7178260 1960-11-25
- Main IPC: H04M1/27
- IPC: H04M1/27 ; H04M1/57
Information query
