Invention Grant
- Patent Title: Photographic sound recording system and aperture plate therefor
- Patent Title (中): 摄影录音系统及孔板
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Application No.: US74254547Application Date: 1947-04-19
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Publication No.: US2468049APublication Date: 1949-04-26
- Inventor: DIMMICK GLENN L
- Applicant: RCA CORP
- Assignee: RCA Corp
- Current Assignee: RCA Corp
- Priority: US74254547 1947-04-19
- Main IPC: G11B7/00
- IPC: G11B7/00
Information query
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