Invention Grant
- Patent Title: Sound recording apparatus
- Patent Title (中): 录音设备
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Application No.: US36156040Application Date: 1940-10-17
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Publication No.: US2287253APublication Date: 1942-06-23
- Inventor: KELLOGG EDWARD W
- Applicant: RCA CORP
- Assignee: Ichikawa Woolen Textile Co Ltd
- Current Assignee: Ichikawa Woolen Textile Co Ltd
- Priority: US36156040 1940-10-17
- Main IPC: H03G7/00
- IPC: H03G7/00
Information query
