Invention Grant
- Patent Title: Phonograph record retaining device for record containers
- Patent Title (中): 留声机录音保留装置
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Application No.: US71192434Application Date: 1934-02-19
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Publication No.: US2022216APublication Date: 1935-11-26
- Inventor: RENHOLDT JOHN E
- Applicant: DICTAPHONE CORP
- Assignee: Dictaphone Corp
- Current Assignee: Dictaphone Corp
- Priority: US71192434 1934-02-19
- Main IPC: G11B33/04
- IPC: G11B33/04
Information query
IPC分类:
