Invention Grant
- Patent Title: Combined recording and reproducing device
- Patent Title (中): 组合录音和再现设备
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Application No.: US52485631Application Date: 1931-03-24
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Publication No.: US1992893APublication Date: 1935-02-26
- Inventor: THOMAS ADOLPH A
- Applicant: RCA CORP
- Assignee: RCA Corp
- Current Assignee: RCA Corp
- Priority: US52485631 1931-03-24
- Main IPC: G11B3/46
- IPC: G11B3/46
Information query
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