Invention Grant
- Patent Title: System of communication
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Application No.: US68634833Application Date: 1933-08-23
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Publication No.: US2189898APublication Date: 1940-02-13
- Inventor: HARTLEY RALPH V L
- Applicant: BELL TELEPHONE LABOR INC
- Assignee: Nokia Bell Labs
- Current Assignee: Nokia Bell Labs
- Priority: US68634833 1933-08-23
- Main IPC: G06G7/24
- IPC: G06G7/24 ; G06G7/26 ; H04N1/407
Information query
