Invention Grant
- Patent Title: Sound recording and reproducing apparatus
- Patent Title (中): 录音和重放设备
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Application No.: US75076634Application Date: 1934-10-31
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Publication No.: US2113400APublication Date: 1938-04-05
- Inventor: DIMMICK GLENN L
- Applicant: RCA CORP
- Assignee: RCA Corp
- Current Assignee: RCA Corp
- Priority: US75076634 1934-10-31
- Main IPC: G11B7/00
- IPC: G11B7/00
Information query
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