Robertshaw Controls Co
RobertshawActive Patents
0
Total Holdings
44
Patent Holdings
Filter in Explorer →| Patent No. | Title | Status | Filing Date | Grant Date | Claims | Actions |
|---|---|---|---|---|---|---|
| US4143616A | Process machinery control system and individual safety cont… | Expired / Lapsed | 1978-02-24 | 1979-03-13 | 64 | Details |
| US4133349A | Condition responsive by-pass valve construction and method … | Expired / Lapsed | 1977-05-25 | 1979-01-09 | 11 | Details |
| US3958240A | Alarm and status monitoring system | Expired / Lapsed | 1973-03-06 | 1976-05-18 | 6 | Details |
| US3949807A | Air conditioning system with integral energy conserving ele… | Expired / Lapsed | 1974-08-30 | 1976-04-13 | 10 | Details |
| US3854122A | Remote station addressing system | Expired / Lapsed | 1972-12-12 | 1974-12-10 | 7 | Details |
| US3714646A | Multiple point alarm system with two state alarm switches | Expired / Lapsed | 1970-08-21 | 1973-01-30 | 13 | Details |
| US3644891A | Field point addressing system and method | Expired / Lapsed | 1970-01-21 | 1972-02-22 | 16 | Details |
| US3644897A | Automatic control point adjustment system and method | Expired / Lapsed | 1970-01-15 | 1972-02-22 | 10 | Details |
| US3644894A | Supervisory control system having alternate scanning | Expired / Lapsed | 1969-11-24 | 1972-02-22 | 22 | Details |
| US3613092A | Sequence counting encoder monitor | Expired / Lapsed | 1969-04-23 | 1971-10-12 | 25 | Details |
| US3537053A | Flexible temperature sensor for motor protection | Expired / Lapsed | 1968-06-17 | 1970-10-27 | 0 | Details |
| US3447145A | Constant surveillance alarm system for a plurality of remot… | Expired / Lapsed | 1966-08-11 | 1969-05-27 | 2 | Details |
| US3406383A | Analog keyed phase transmitter and system | Expired / Lapsed | 1964-08-21 | 1968-10-15 | 2 | Details |
| US3400374A | Computerized control systems | Expired / Lapsed | 1965-06-16 | 1968-09-03 | 0 | Details |
| US3360715A | Condition responsive solid state transducing and indicating… | Expired / Lapsed | 1965-07-19 | 1967-12-26 | 2 | Details |
| US3338519A | Zone load responsive optimizing control system | Expired / Lapsed | 1964-07-16 | 1967-08-29 | 2 | Details |
| US3310713A | Temperature control system | Expired / Lapsed | 1964-01-13 | 1967-03-21 | 2 | Details |
| US3288370A | Fluid system and control device therefor or the like | Expired / Lapsed | 1963-10-08 | 1966-11-29 | 2 | Details |
| US3257508A | Non-synchronous phase shift communication system | Expired / Lapsed | 1962-11-05 | 1966-06-21 | 1 | Details |
| US3254670A | Controller indicator and controller indicating system | Expired / Lapsed | 1963-11-15 | 1966-06-07 | 2 | Details |
| US3254838A | Temperature control arrangements | Expired / Lapsed | 1962-09-17 | 1966-06-07 | 0 | Details |
| US3242431A | Phase shift keying communication system | Expired / Lapsed | 1962-05-04 | 1966-03-22 | 2 | Details |
| US3233059A | Vacuum operated electrical switch or the like | Expired / Lapsed | 1962-08-22 | 1966-02-01 | 2 | Details |
| US3232116A | Bourdon spiral assembly | Expired / Lapsed | 1962-08-06 | 1966-02-01 | 2 | Details |
| US3186105A | Automatically operated clothes drier | Expired / Lapsed | 1960-10-24 | 1965-06-01 | 2 | Details |
| US3176109A | Circuit flutter preventing switch construction | Expired / Lapsed | 1963-05-02 | 1965-03-30 | 1 | Details |
| US3147437A | Single side band radio carrier retrieval system | Expired / Lapsed | 1962-03-13 | 1964-09-01 | 2 | Details |
| US3112448A | Phase shift keying communication system | Expired / Lapsed | 1958-04-28 | 1963-11-26 | 1 | Details |
| US3107693A | Pneumatic relay | Expired / Lapsed | 1961-05-24 | 1963-10-22 | 0 | Details |
| US3104385A | Temperature sensitive bridge circuits | Expired / Lapsed | 1959-02-25 | 1963-09-17 | 2 | Details |
| US3078344A | Phase demodulation of keyed carrier by use of synchronous g… | Expired / Lapsed | 1960-10-25 | 1963-02-19 | 2 | Details |
| US3061823A | Differential pressure transmitter | Expired / Lapsed | 1957-09-13 | 1962-10-30 | 0 | Details |
| US2993997A | Refueling contact aid | Expired / Lapsed | 1957-06-28 | 1961-07-25 | 0 | Details |
| US2991354A | Automatic frequency control for phase shift keying communic… | Expired / Lapsed | 1959-04-27 | 1961-07-04 | 0 | Details |
| US2946943A | Parallel component controller servosystem | Expired / Lapsed | 1956-02-20 | 1960-07-26 | 0 | Details |
| US2922858A | Magnetic switch | Expired / Lapsed | 1958-03-03 | 1960-01-26 | 0 | Details |
| US2819362A | Switches | Expired / Lapsed | 1953-12-09 | 1958-01-07 | 0 | Details |
| US2800284A | Control and indicating device for fluid fuel burners | Expired / Lapsed | 1955-03-25 | 1957-07-23 | 0 | Details |
| US2704342A | Fluid level actuated follow-up mechanism | Expired / Lapsed | 1951-04-13 | 1955-03-15 | 0 | Details |
| US2596812A | Water heater control | Expired / Lapsed | 1949-03-02 | 1952-05-13 | 0 | Details |
| US2564867A | Condition responsive control for clothes driers and the like | Expired / Lapsed | 1946-08-05 | 1951-08-21 | 0 | Details |
| US2535892A | Control for systems using either heating or cooling medium | Expired / Lapsed | 1948-08-02 | 1950-12-26 | 0 | Details |
| US2507621A | Fluid mixing device | Expired / Lapsed | 1947-08-07 | 1950-05-16 | 0 | Details |
| US2466846A | Pressure measuring device | Expired / Lapsed | 1945-12-27 | 1949-04-12 | 0 | Details |