Invention Grant
- Patent Title: Number plate for telephone dials
- Patent Title (中): 电话拨号盘
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Application No.: US70914834Application Date: 1934-01-31
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Publication No.: US2002969APublication Date: 1935-05-28
- Inventor: WERRING WALTER W , HUXHAM TREVOR S
- Applicant: BELL TELEPHONE LABOR INC
- Assignee: Nokia Bell Labs
- Current Assignee: Nokia Bell Labs
- Priority: US70914834 1934-01-31
- Main IPC: H04M1/23
- IPC: H04M1/23
Information query
