Invention Grant
- Patent Title: Telephone receiver
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Application No.: US6603725Application Date: 1925-10-31
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Publication No.: US1683945APublication Date: 1928-09-11
- Inventor: NATHANIEL BALDWIN
- Applicant: NATHANIEL BALDWIN
- Assignee: Baldwin Nathaniel
- Current Assignee: Baldwin Nathaniel
- Priority: US6603725 1925-10-31
- Main IPC: H04R11/00
- IPC: H04R11/00
Information query
