Invention Grant
- Patent Title: Flux modulated ringer
- Patent Title (中): 磁通调制振铃器
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Application No.: US19197750Application Date: 1950-10-25
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Publication No.: US2716232APublication Date: 1955-08-23
- Inventor: POWER JAMES R
- Applicant: BELL TELEPHONE LABOR INC
- Assignee: Nokia Bell Labs
- Current Assignee: Nokia Bell Labs
- Priority: US19197750 1950-10-25
- Main IPC: G10K1/062
- IPC: G10K1/062
Information query
