Invention Grant
- Patent Title: Sound-reproducing machine
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Application No.: US31103119Application Date: 1919-07-15
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Publication No.: US1524174APublication Date: 1925-01-27
- Inventor: DOUGLASS LEON F
- Applicant: VICTOR TALKING MACHINE CO
- Assignee: Victor Talking Machine Co
- Current Assignee: Victor Talking Machine Co
- Priority: US31103119 1919-07-15
- Main IPC: G11B3/00
- IPC: G11B3/00
Information query
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