Invention Grant
- Patent Title: Phonographs
- Patent Title (中): 留声机
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Application No.: US71304546Application Date: 1946-11-29
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Publication No.: US2719720APublication Date: 1955-10-04
- Inventor: ROCKOLA DAVID C
- Applicant: ROCK OLA MFG CORP
- Assignee: Rock Ola Mfg Corp
- Current Assignee: Rock Ola Mfg Corp
- Priority: US71304546 1946-11-29
- Main IPC: G11B17/26
- IPC: G11B17/26
Information query
IPC分类:
