AMERICAN TELEGRAPHONE Co
AMERICAN TActive Patents
0
Total Holdings
8
Patent Holdings
Filter in Explorer →| Patent No. | Title | Status | Filing Date | Grant Date | Claims | Actions |
|---|---|---|---|---|---|---|
| US1142384A | Telegraphone. | Expired / Lapsed | 1909-03-17 | 1915-06-08 | 0 | Details |
| US909414A | Telegraphone apparatus. | Expired / Lapsed | 1907-12-31 | 1909-01-12 | 0 | Details |
| US882329A | Telegraphone. | Expired / Lapsed | 1907-03-25 | 1908-03-17 | 0 | Details |
| US873084A | Telegraphone. | Expired / Lapsed | 1907-05-02 | 1907-12-10 | 0 | Details |
| US873083A | Telegraphone. | Expired / Lapsed | 1907-05-02 | 1907-12-10 | 0 | Details |
| US873078A | Electromagnet for telegraphone purposes. | Expired / Lapsed | 1907-05-02 | 1907-12-10 | 0 | Details |
| US873042A | Apparatus for receiving and strengthening the reproduction … | Expired / Lapsed | 1907-05-02 | 1907-12-10 | 0 | Details |
| US836339A | Magnetizable body for the magnetic record of speech, &c. | Expired / Lapsed | 1901-06-21 | 1906-11-20 | 0 | Details |