Invention Grant
- Patent Title: Pulse modulation sound recording system
- Patent Title (中): 脉冲调制录音系统
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Application No.: US58884645Application Date: 1945-04-17
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Publication No.: US2510121APublication Date: 1950-06-06
- Inventor: LEHMANN GERARD J , YOUNG JR NORMAN H
- Applicant: STANDARD TELEPHONES CABLES LTD
- Assignee: Union Carbide Corp
- Current Assignee: Union Carbide Corp
- Priority: US58884645 1945-04-17
- Main IPC: G11B7/00
- IPC: G11B7/00
Information query
IPC分类:
