PHOTOSWITCH Inc
PHOTOSWITCActive Patents
0
Total Holdings
10
Patent Holdings
Filter in Explorer →| Patent No. | Title | Status | Filing Date | Grant Date | Claims | Actions |
|---|---|---|---|---|---|---|
| US2553420A | Radiation detector | Expired / Lapsed | 1948-09-29 | 1951-05-15 | 0 | Details |
| US2468791A | Conductivity control | Expired / Lapsed | 1945-06-30 | 1949-05-03 | 0 | Details |
| US2450459A | Electrode system | Expired / Lapsed | 1944-01-13 | 1948-10-05 | 0 | Details |
| US2442910A | Electronic comparator densitometer | Expired / Lapsed | 1944-06-24 | 1948-06-08 | 0 | Details |
| US2429500A | Photoelectric control | Expired / Lapsed | 1942-01-17 | 1947-10-21 | 0 | Details |
| US2375456A | Photoelectric safety circuit | Expired / Lapsed | 1942-10-10 | 1945-05-08 | 0 | Details |
| US2360885A | Photoelectric supervision of filling stations | Expired / Lapsed | 1942-11-11 | 1944-10-24 | 0 | Details |
| US2306237A | Electronic timing device | Expired / Lapsed | 1940-11-07 | 1942-12-22 | 0 | Details |
| US2306073A | Photoelectric control of heating equipment | Expired / Lapsed | 1939-12-08 | 1942-12-22 | 0 | Details |
| US2256595A | Photoelectric system | Expired / Lapsed | 1939-07-13 | 1941-09-23 | 0 | Details |