Invention Grant
- Patent Title: Two-way telephone system
- Patent Title (中): 双向电话系统
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Application No.: US50835443Application Date: 1943-10-30
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Publication No.: US2425495APublication Date: 1947-08-12
- Inventor: TREVOR BERTRAM A , ATWOOD JOHN B
- Applicant: RCA CORP
- Assignee: Sankyo Co Ltd
- Current Assignee: Sankyo Co Ltd
- Priority: US50835443 1943-10-30
- Main IPC: H04M11/00
- IPC: H04M11/00
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