Hamilton Watch Co
Hamilton WActive Patents
0
Total Holdings
12
Patent Holdings
Filter in Explorer →| Patent No. | Title | Status | Filing Date | Grant Date | Claims | Actions |
|---|---|---|---|---|---|---|
| US3701249A | Solid state timepiece with liquid crystal display | Expired / Lapsed | 1971-03-12 | 1972-10-31 | 22 | Details |
| US3672155A | Solid state watch | Expired / Lapsed | 1970-05-06 | 1972-06-27 | 23 | Details |
| US3613351A | Wristwatch with liquid crystal display | Expired / Lapsed | 1969-05-13 | 1971-10-19 | 0 | Details |
| US3576099A | Solid state timepiece having electro-optical time display | Expired / Lapsed | 1969-04-22 | 1971-04-27 | 28 | Details |
| US3488942A | Pallet type index system | Expired / Lapsed | 1967-09-20 | 1970-01-13 | 0 | Details |
| US3310641A | Rotary switch with improved contact element structure | Expired / Lapsed | 1964-11-02 | 1967-03-21 | 1 | Details |
| US2997839A | Indexing and contact mechanism | Expired / Lapsed | 1958-07-16 | 1961-08-29 | 0 | Details |
| US2994023A | Motor | Expired / Lapsed | 1958-10-30 | 1961-07-25 | 0 | Details |
| US2457631A | Cylindrical hairspring form | Expired / Lapsed | 1943-09-22 | 1948-12-28 | 0 | Details |
| US2402012A | Frequency multiplying apparatus | Expired / Lapsed | 1943-11-20 | 1946-06-11 | 0 | Details |
| US2379801A | Method of producing stepped wire | Expired / Lapsed | 1943-05-03 | 1945-07-03 | 0 | Details |
| US2339136A | Heat treating device | Expired / Lapsed | 1941-09-04 | 1944-01-11 | 0 | Details |