Patent Explorer
Browse, filter, and analyze 16 patents across global jurisdictions.
| Patent Number | Title | Assignee | Status | Filing Date | Grant Date | Expires | Remaining | Claims | Actions |
|---|---|---|---|---|---|---|---|---|---|
| US2570451A | Liquid level control system | Penn Electric Switch Co | Expired / Lapsed | 1948-08-17 | 1951-10-09 | 1968-08-17 | 0.0 yrs | 0 | |
| US2385887A | Switch unit | Penn Electric Switch Co | Expired / Lapsed | 1942-06-09 | 1945-10-02 | 1962-06-09 | 0.0 yrs | 0 | |
| US2365650A | Water valve | Penn Electric Switch Co | Expired / Lapsed | 1942-09-22 | 1944-12-19 | 1962-09-22 | 0.0 yrs | 0 | |
| US2332212A | Thermostat | Penn Electric Switch Co | Expired / Lapsed | 1941-03-05 | 1943-10-19 | 1961-03-05 | 0.0 yrs | 0 | |
| US2302250A | Double magnet snap action | Penn Electric Switch Co | Expired / Lapsed | 1941-05-07 | 1942-11-17 | 1961-05-07 | 0.0 yrs | 0 | |
| US2269864A | Safety control | Penn Electric Switch Co | Expired / Lapsed | 1939-10-16 | 1942-01-13 | 1959-10-16 | 0.0 yrs | 0 | |
| US2262342A | Humidostat | Penn Electric Switch Co | Expired / Lapsed | 1939-05-22 | 1941-11-11 | 1959-05-22 | 0.0 yrs | 0 | |
| US2198131A | Humidostat | Penn Electric Switch Co | Expired / Lapsed | 1938-03-07 | 1940-04-23 | 1958-03-07 | 0.0 yrs | 0 | |
| US2170341A | Switch unit | Penn Electric Switch Co | Expired / Lapsed | 1938-08-22 | 1939-08-22 | 1958-08-22 | 0.0 yrs | 0 | |
| US2136753A | Variable temperature burner control system | Penn Electric Switch Co | Expired / Lapsed | 1936-01-28 | 1938-11-15 | 1956-01-28 | 0.0 yrs | 0 | |
| US2111816A | Control switch unit | Penn Electric Switch Co | Expired / Lapsed | 1936-05-25 | 1938-03-22 | 1956-05-25 | 0.0 yrs | 0 | |
| US2044397A | Temperature responsive switch | Penn Electric Switch Co | Expired / Lapsed | 1933-10-16 | 1936-06-16 | 1953-10-16 | 0.0 yrs | 0 | |
| US2024385A | Heater-cooler thermostat | Penn Electric Switch Co | Expired / Lapsed | 1934-10-29 | 1935-12-17 | 1954-10-29 | 0.0 yrs | 0 | |
| US2020618A | Electric control structure | Penn Electric Switch Co | Expired / Lapsed | 1932-09-06 | 1935-11-12 | 1952-09-06 | 0.0 yrs | 0 | |
| US1788678A | Controlling device | Penn Electric Switch Co | Expired / Lapsed | 1924-09-02 | 1931-01-13 | 1944-09-02 | 0.0 yrs | 0 | |
| US1708309A | Thermal controlling system | Penn Electric Switch Co | Expired / Lapsed | 1924-09-10 | 1929-04-09 | 1944-09-10 | 0.0 yrs | 0 |