Federal Telecommunication Laboratories Inc
Federal TeActive Patents
0
Total Holdings
11
Patent Holdings
Filter in Explorer →| Patent No. | Title | Status | Filing Date | Grant Date | Claims | Actions |
|---|---|---|---|---|---|---|
| US2661388A | Primary cells | Expired / Lapsed | 1952-05-06 | 1953-12-01 | 2 | Details |
| US2651740A | Electron switching device | Expired / Lapsed | 1951-09-29 | 1953-09-08 | 0 | Details |
| US2541039A | Amplitude channelizer | Expired / Lapsed | 1948-03-06 | 1951-02-13 | 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 |
| 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 |
| US2480130A | Low impedance switch circuit | Expired / Lapsed | 1946-04-06 | 1949-08-30 | 0 | Details |