Invention Grant
- Patent Title: Stereophonographic apparatus and method
- Patent Title (中): 立体声学仪器和方法
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Application No.: US75985434Application Date: 1934-12-31
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Publication No.: US2124030APublication Date: 1938-07-19
- Inventor: DOUDEN WILLIAM L
- Applicant: RCA CORP
- Assignee: RCA Corp
- Current Assignee: RCA Corp
- Priority: US75985434 1934-12-31
- Main IPC: G11B7/00
- IPC: G11B7/00 ; H04R5/00 ; H04R11/08
Information query
IPC分类:
