Invention Grant
- Patent Title: Sound recording system
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Application No.: US31163839Application Date: 1939-12-29
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Publication No.: US2268438APublication Date: 1941-12-30
- Inventor: BATSEL CECIL N
- Applicant: RCA CORP
- Assignee: RCA Corp
- Current Assignee: RCA Corp
- Priority: US31163839 1939-12-29
Information query
