Federal Telecommunication Laboratories Inc
Federal TeActive Patents
0
Total Holdings
23
Patent Holdings
Filter in Explorer →| Patent No. | Title | Status | Filing Date | Grant Date | Claims | Actions |
|---|---|---|---|---|---|---|
| US2666845A | Two-way communication system | Expired / Lapsed | 1951-11-28 | 1954-01-19 | 0 | Details |
| US2661388A | Primary cells | Expired / Lapsed | 1952-05-06 | 1953-12-01 | 2 | Details |
| US2654842A | Radio frequency antenna | Expired / Lapsed | 1951-07-21 | 1953-10-06 | 0 | Details |
| US2651753A | Pulse keying system | Expired / Lapsed | 1952-10-02 | 1953-09-08 | 0 | Details |
| US2651740A | Electron switching device | Expired / Lapsed | 1951-09-29 | 1953-09-08 | 0 | Details |
| US2609529A | Pulse code translator | Expired / Lapsed | 1950-01-07 | 1952-09-02 | 0 | Details |
| US2581358A | Display system indicating craft position and movement | Expired / Lapsed | 1946-02-05 | 1952-01-08 | 0 | Details |
| US2541039A | Amplitude channelizer | Expired / Lapsed | 1948-03-06 | 1951-02-13 | 0 | Details |
| US2541040A | Radio range beacon | Expired / Lapsed | 1946-02-05 | 1951-02-13 | 0 | Details |
| US2528569A | Voltage regulator circuit | Expired / Lapsed | 1946-06-22 | 1950-11-07 | 0 | Details |
| US2524832A | Pulse-time telemetering system | Expired / Lapsed | 1946-04-06 | 1950-10-10 | 0 | Details |
| US2521733A | Pulse code modulator | Expired / Lapsed | 1948-02-03 | 1950-09-12 | 0 | Details |
| US2512676A | Electronic switching | Expired / Lapsed | 1947-12-11 | 1950-06-27 | 0 | Details |
| US2506613A | Multidigit all-electronic switching system | Expired / Lapsed | 1946-02-07 | 1950-05-09 | 0 | Details |
| US2498688A | Demodulator and channel separator system | Expired / Lapsed | 1946-06-22 | 1950-02-28 | 0 | Details |
| US2492134A | Pulse coding system | Expired / Lapsed | 1947-11-29 | 1949-12-27 | 0 | Details |
| US2492180A | Ringing arrangement for electronic switching systems | Expired / Lapsed | 1947-04-26 | 1949-12-27 | 0 | Details |
| US2492136A | Electronic telephone exchange | Expired / Lapsed | 1946-03-14 | 1949-12-27 | 0 | Details |
| US2490833A | All electronic line finder and selector system | Expired / Lapsed | 1947-04-26 | 1949-12-13 | 0 | Details |
| US2485576A | Sector antenna switching | Expired / Lapsed | 1947-04-19 | 1949-10-25 | 0 | Details |
| US2480130A | Low impedance switch circuit | Expired / Lapsed | 1946-04-06 | 1949-08-30 | 0 | Details |
| US2468085A | Two-way pulse multichannel system employing cathode-ray tub… | Expired / Lapsed | 1946-08-24 | 1949-04-26 | 0 | Details |
| US2426205A | Pulse selecting circuit for multiplex systems | Expired / Lapsed | 1946-03-02 | 1947-08-26 | 0 | Details |