Invention Grant
- Patent Title: Electromagnetic device
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Application No.: US29080928Application Date: 1928-07-06
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Publication No.: US1816558APublication Date: 1931-07-28
- Inventor: ZUPA FRANK A
- Applicant: BELL TELEPHONE LABOR INC
- Assignee: Nokia Bell Labs
- Current Assignee: Nokia Bell Labs
- Priority: US29080928 1928-07-06
- Main IPC: H01H51/22
- IPC: H01H51/22
Information query
