Invention Grant
- Patent Title: Telephone system
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Application No.: US23554838Application Date: 1938-10-18
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Publication No.: US2201296APublication Date: 1940-05-21
- Inventor: LUNDSTROM ALEXIS A , NORTON EDWARD L
- Applicant: BELL TELEPHONE LABOR INC
- Assignee: Nokia Bell Labs
- Current Assignee: Nokia Bell Labs
- Priority: US23554838 1938-10-18
- Main IPC: H04M1/50
- IPC: H04M1/50 ; H04Q3/42 ; H04Q5/08
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