Invention Grant
- Patent Title: Magnetic dial
- Patent Title (中): 磁性表盘
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Application No.: US38351941Application Date: 1941-03-15
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Publication No.: US2319321APublication Date: 1943-05-18
- Inventor: HEAD GEORGE A
- Applicant: BELL TELEPHONE LABOR INC
- Assignee: Nokia Bell Labs
- Current Assignee: Nokia Bell Labs
- Priority: US38351941 1941-03-15
- Main IPC: H04M1/31
- IPC: H04M1/31
Information query
