Societe Francaise Radio Electrique
Societe FrActive Patents
0
Total Holdings
10
Patent Holdings
Filter in Explorer →| Patent No. | Title | Status | Filing Date | Grant Date | Claims | Actions |
|---|---|---|---|---|---|---|
| US2807783A | Pulse code modulation systems | Expired / Lapsed | 1954-04-27 | 1957-09-24 | 0 | Details |
| US2582310A | Self-identifying reflecting radio beacon | Expired / Lapsed | 1946-08-02 | 1952-01-15 | 0 | Details |
| FR989714A | Improvements in the manufacture of vacuum tubes, and more p… | Expired / Lapsed | 1944-03-03 | 1951-09-12 | 0 | Details |
| US2533769A | Radio altimeter | Expired / Lapsed | 1947-10-09 | 1950-12-12 | 0 | Details |
| US2513454A | Radioaltimeter amplifier | Expired / Lapsed | 1947-02-27 | 1950-07-04 | 0 | Details |
| US2505266A | Radioelectric communication device | Expired / Lapsed | 1947-06-17 | 1950-04-25 | 0 | Details |
| US2505262A | Electromechanical remote-control device | Expired / Lapsed | 1946-08-09 | 1950-04-25 | 0 | Details |
| US1932925A | Automatic radioelectric standby device | Expired / Lapsed | 1931-09-17 | 1933-10-31 | 0 | Details |
| US1917426A | Multistage amplifier | Expired / Lapsed | 1928-02-17 | 1933-07-11 | 0 | Details |
| US1892383A | High frequency signaling | Expired / Lapsed | 1931-04-29 | 1932-12-27 | 0 | Details |