Patent Explorer
Browse, filter, and analyze 15 patents across global jurisdictions.
| Patent Number | Title | Assignee | Status | Filing Date | Grant Date | Expires | Remaining | Claims | Actions |
|---|---|---|---|---|---|---|---|---|---|
| US4044823A | Method and apparatus for controlling air-conditioning systems | Robertshaw US Holding Corp | Expired / Lapsed | 1976-02-26 | 1977-08-30 | 1996-02-26 | 0.0 yrs | 4 | |
| US3915376A | Air conditioning control system | Robertshaw US Holding Corp | Expired / Lapsed | 1974-02-01 | 1975-10-28 | 1994-02-01 | 0.0 yrs | 11 | |
| US3826963A | Damper actuator controls for air conditioning systems | Robertshaw US Holding Corp | Expired / Lapsed | 1972-05-30 | 1974-07-30 | 1992-05-30 | 0.0 yrs | 0 | |
| US3820713A | Multiple zone air conditioning system | Robertshaw US Holding Corp | Expired / Lapsed | 1973-06-08 | 1974-06-28 | 1993-06-08 | 0.0 yrs | 16 | |
| US3788386A | Multiple zone air conditioning system | Robertshaw US Holding Corp | Expired / Lapsed | 1971-11-30 | 1974-01-29 | 1991-11-30 | 0.0 yrs | 16 | |
| US3745778A | Method and system for controlling air temperature in an air conditioned zone | Robertshaw US Holding Corp | Expired / Lapsed | 1970-11-09 | 1973-07-17 | 1990-11-09 | 0.0 yrs | 15 | |
| US3645325A | Air-conditioning control system for minimizing offset and zone temperature oscillations | Robertshaw US Holding Corp | Expired / Lapsed | 1970-09-23 | 1972-02-29 | 1990-09-23 | 0.0 yrs | 16 | |
| US3611906A | Ventilating system and control therefor | Robertshaw US Holding Corp | Expired / Lapsed | 1969-07-24 | 1971-10-12 | 1989-07-24 | 0.0 yrs | 10 | |
| US3410486A | Control system for heating and cooling apparatus | Robertshaw US Holding Corp | Expired / Lapsed | 1965-11-10 | 1968-11-12 | 1985-11-10 | 0.0 yrs | 0 | |
| US3121338A | Control apparatus | Robertshaw US Holding Corp | Expired / Lapsed | 1961-09-13 | 1964-02-18 | 1981-09-13 | 0.0 yrs | 2 | |
| US2744389A | Defroster control for refrigerating systems | Robertshaw US Holding Corp | Expired / Lapsed | 1952-10-15 | 1956-05-08 | 1972-10-15 | 0.0 yrs | 0 | |
| US2490919A | Control apparatus | Robertshaw US Holding Corp | Expired / Lapsed | 1945-09-06 | 1949-12-13 | 1965-09-06 | 0.0 yrs | 0 | |
| US2466809A | Pressure measuring apparatus | Robertshaw US Holding Corp | Expired / Lapsed | 1944-05-15 | 1949-04-12 | 1964-05-15 | 0.0 yrs | 0 | |
| US2388542A | Pressure measuring device | Robertshaw US Holding Corp | Expired / Lapsed | 1944-05-15 | 1945-11-06 | 1964-05-15 | 0.0 yrs | 0 | |
| US2170426A | Control apparatus | Robertshaw US Holding Corp | Expired / Lapsed | 1937-05-19 | 1939-08-22 | 1957-05-19 | 0.0 yrs | 0 |