Invention Grant
- Patent Title: Electromagnetic switching
- Patent Title (中): 电磁开关
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Application No.: US62401856Application Date: 1956-11-23
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Publication No.: US2844688APublication Date: 1958-07-22
- Inventor: PFANN WILLIAM G
- Applicant: BELL TELEPHONE LABOR INC
- Assignee: Nokia Bell Labs
- Current Assignee: Nokia Bell Labs
- Priority: US62401856 1956-11-23
- Main IPC: H01H50/60
- IPC: H01H50/60 ; H01H51/28
Information query
