Gilfillan Bros Inc
GilfillanActive Patents
0
Total Holdings
23
Patent Holdings
Filter in Explorer →| Patent No. | Title | Status | Filing Date | Grant Date | Claims | Actions |
|---|---|---|---|---|---|---|
| US3111643A | Air traffic schedule monitoring method and system | Expired / Lapsed | 1956-05-21 | 1963-11-19 | 2 | Details |
| US3096513A | Semi-automatic ground controlled appoach system | Expired / Lapsed | 1957-10-14 | 1963-07-02 | 2 | Details |
| US3050708A | Time reference generator | Expired / Lapsed | 1956-05-08 | 1962-08-21 | 0 | Details |
| US3031658A | Air traffic control system | Expired / Lapsed | 1956-08-21 | 1962-04-24 | 0 | Details |
| US3017628A | Method of and apparatus for identifying aircraft during gro… | Expired / Lapsed | 1956-06-04 | 1962-01-16 | 0 | Details |
| US2974224A | Apparatus for automatic gain control | Expired / Lapsed | 1956-08-28 | 1961-03-07 | 0 | Details |
| US2962661A | Demodulator-modulator | Expired / Lapsed | 1957-07-11 | 1960-11-29 | 0 | Details |
| US2938206A | Radiant energy receiver system | Expired / Lapsed | 1956-07-02 | 1960-05-24 | 0 | Details |
| US2932812A | Traffic analyzer | Expired / Lapsed | 1956-02-24 | 1960-04-12 | 0 | Details |
| US2927751A | Air traffic control system using ideal approach tracks | Expired / Lapsed | 1953-11-02 | 1960-03-08 | 0 | Details |
| US2892945A | Follow-up system | Expired / Lapsed | 1957-09-09 | 1959-06-30 | 0 | Details |
| US2848713A | Highly discriminative filter and bias-level gating circuit | Expired / Lapsed | 1955-02-03 | 1958-08-19 | 0 | Details |
| US2844817A | Landing traffic control system | Expired / Lapsed | 1952-02-18 | 1958-07-22 | 0 | Details |
| US2840707A | Fast-acting sampling circuit | Expired / Lapsed | 1955-03-07 | 1958-06-24 | 0 | Details |
| US2830152A | Switch means and method of fabricating same | Expired / Lapsed | 1955-06-27 | 1958-04-08 | 0 | Details |
| US2774064A | Overtake warning and wave-off | Expired / Lapsed | 1951-12-24 | 1956-12-11 | 0 | Details |
| US2741760A | System for visually checking alignment of computer-tracking… | Expired / Lapsed | 1952-06-02 | 1956-04-10 | 0 | Details |
| US2717377A | Automatic amplitude cancellation in moving target indicator | Expired / Lapsed | 1951-02-21 | 1955-09-06 | 0 | Details |
| US2709252A | Multi-plane tracking in ground controlled approach system | Expired / Lapsed | 1948-08-20 | 1955-05-24 | 0 | Details |
| US2698914A | Fast time constant circuit with clipping diode | Expired / Lapsed | 1950-08-28 | 1955-01-04 | 0 | Details |
| US2663868A | Sweep limiter in radar indicating system | Expired / Lapsed | 1951-02-21 | 1953-12-22 | 0 | Details |
| US2649581A | Single scope two-coordinate radar system | Expired / Lapsed | 1947-09-29 | 1953-08-18 | 0 | Details |
| US2483644A | Electronic angle indication with particular reference to ra… | Expired / Lapsed | 1947-01-21 | 1949-10-04 | 0 | Details |