Invention Grant
- Patent Title: Sound recording and reproducing
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Application No.: US27540928Application Date: 1928-05-05
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Publication No.: US1799795APublication Date: 1931-04-07
- Inventor: HORTON JOSEPH W
- Applicant: BELL TELEPHONE LABOR INC
- Assignee: Nokia Bell Labs
- Current Assignee: Nokia Bell Labs
- Priority: US27540928 1928-05-05
- Main IPC: H04K1/00
- IPC: H04K1/00
Information query
