Hartford National Bank and Trust Co
Hartford NActive Patents
0
Total Holdings
11
Patent Holdings
Filter in Explorer →| Patent No. | Title | Status | Filing Date | Grant Date | Claims | Actions |
|---|---|---|---|---|---|---|
| US2752496A | Circuit arrangement for automatic resonance tuning of a hig… | Expired / Lapsed | 1952-02-26 | 1956-06-26 | 0 | Details |
| US2751318A | Method of manufacturing coils | Expired / Lapsed | 1954-05-14 | 1956-06-19 | 2 | Details |
| US2662214A | Frequency-modulated oscillator | Expired / Lapsed | 1951-07-30 | 1953-12-08 | 0 | Details |
| US2616813A | Condenser | Expired / Lapsed | 1949-10-29 | 1952-11-04 | 2 | Details |
| US2434236A | Ceramic insulator | Expired / Lapsed | 1943-01-18 | 1948-01-06 | 0 | Details |
| US2428400A | Blocking-layer cells comprising one or more grids embedded … | Expired / Lapsed | 1943-01-18 | 1947-10-07 | 0 | Details |
| US2406309A | Frequency stabilization | Expired / Lapsed | 1942-11-03 | 1946-08-20 | 0 | Details |
| US2330950A | Ceramic insulator and method of making the same | Expired / Lapsed | 1940-02-28 | 1943-10-05 | 0 | Details |
| US2265203A | Telephony | Expired / Lapsed | 1939-04-26 | 1941-12-09 | 0 | Details |
| US2265216A | Multiplex telephony system | Expired / Lapsed | 1939-04-20 | 1941-12-09 | 0 | Details |
| US2263369A | Multiplex telephony system | Expired / Lapsed | 1940-01-08 | 1941-11-18 | 0 | Details |