Invention Grant
- Patent Title: Recording of sound
- Patent Title (中): 记录声音
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Application No.: US4796835Application Date: 1935-11-02
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Publication No.: US2109452APublication Date: 1938-03-01
- Inventor: DIMMICK GLENN L
- Applicant: RCA CORP
- Assignee: RCA Corp
- Current Assignee: RCA Corp
- Priority: US4796835 1935-11-02
- Main IPC: G11B7/00
- IPC: G11B7/00
Information query
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