Invention Grant
- Patent Title: Signaling wave generator
- Patent Title (中): 信号波发生器
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Application No.: US32690840Application Date: 1940-03-30
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Publication No.: US2277809APublication Date: 1942-03-31
- Inventor: WRATHALL LEISHMAN R
- Applicant: BELL TELEPHONE LABOR INC
- Assignee: Nokia Bell Labs
- Current Assignee: Nokia Bell Labs
- Priority: US32690840 1940-03-30
- Main IPC: H04M19/02
- IPC: H04M19/02
Information query
