Perfex Corp
Perfex CorActive Patents
0
Total Holdings
8
Patent Holdings
Filter in Explorer →| Patent No. | Title | Status | Filing Date | Grant Date | Claims | Actions |
|---|---|---|---|---|---|---|
| US2646932A | Modulating gas control | Expired / Lapsed | 1950-02-16 | 1953-07-28 | 0 | Details |
| US2410055A | Snap switch | Expired / Lapsed | 1944-07-28 | 1946-10-29 | 0 | Details |
| US2402173A | Relay switch | Expired / Lapsed | 1940-03-29 | 1946-06-18 | 0 | Details |
| US2370205A | Burner control apparatus | Expired / Lapsed | 1941-08-22 | 1945-02-27 | 0 | Details |
| US2353740A | Control apparatus | Expired / Lapsed | 1942-01-19 | 1944-07-18 | 0 | Details |
| US2322762A | Heat motor actuated device | Expired / Lapsed | 1940-06-21 | 1943-06-29 | 0 | Details |
| US2315533A | Control device | Expired / Lapsed | 1940-03-02 | 1943-04-06 | 0 | Details |
| US2290944A | Control device | Expired / Lapsed | 1938-09-06 | 1942-07-28 | 0 | Details |