Invention Grant
- Patent Title: Telephone signaling circuit
- Patent Title (中): 电话信令电路
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Application No.: US5135260Application Date: 1960-08-23
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Publication No.: US3118019APublication Date: 1964-01-14
- Inventor: FEDER HERBERT S , THOMAS JR GEORGE B
- Applicant: BELL TELEPHONE LABOR INC
- Assignee: Nokia Bell Labs
- Current Assignee: Nokia Bell Labs
- Priority: US5135260 1960-08-23
- Main IPC: H04J3/12
- IPC: H04J3/12 ; H04J3/20 ; H04Q11/04
Information query
