Robertshaw Controls Co
RobertshawActive Patents
0
Total Holdings
83
Patent Holdings
Filter in Explorer →| Patent No. | Title | Status | Filing Date | Grant Date | Claims | Actions |
|---|---|---|---|---|---|---|
| US5125901A | Intermittent patient suction system, self-contained control | Expired / Lapsed | 1991-03-04 | 1992-06-30 | 10 | Details |
| 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 |
| US3978881A | Gas line pierce valve | Expired / Lapsed | 1975-06-05 | 1976-09-07 | 13 | 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 |
| US3884587A | Valve construction and improved parts for the same or the l… | Expired / Lapsed | 1973-10-10 | 1975-05-20 | 8 | Details |
| US3854122A | Remote station addressing system | Expired / Lapsed | 1972-12-12 | 1974-12-10 | 7 | Details |
| US3837688A | Joint construction and method of making the same or the like | Expired / Lapsed | 1973-07-09 | 1974-09-24 | 14 | Details |
| US3753792A | Method of achieving thermally balanced hot wire relay type … | Expired / Lapsed | 1971-12-09 | 1973-08-21 | 9 | 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 |
| US3633050A | Time delay circuit with normally conducting fet gated off d… | Expired / Lapsed | 1970-01-12 | 1972-01-04 | 10 | Details |
| US3613092A | Sequence counting encoder monitor | Expired / Lapsed | 1969-04-23 | 1971-10-12 | 25 | Details |
| US3610279A | Mixing valve construction, system and method | Expired / Lapsed | 1970-02-26 | 1971-10-05 | 7 | Details |
| US3594674A | Temperature-responsive control devcies adjustably responsiv… | Expired / Lapsed | 1969-08-13 | 1971-07-20 | 29 | Details |
| US3544744A | Double diaphragm pressure responsive switch construction | Expired / Lapsed | 1968-06-14 | 1970-12-01 | 0 | Details |
| US3537053A | Flexible temperature sensor for motor protection | Expired / Lapsed | 1968-06-17 | 1970-10-27 | 0 | Details |
| US3523700A | Pneumatic harness plug assembly or the like | Expired / Lapsed | 1966-09-12 | 1970-08-11 | 0 | Details |
| US3474388A | Terminal connector in electromagnetic assembly | Expired / Lapsed | 1966-02-14 | 1969-10-21 | 0 | Details |
| US3447145A | Constant surveillance alarm system for a plurality of remot… | Expired / Lapsed | 1966-08-11 | 1969-05-27 | 2 | Details |
| US3433413A | Small pneumatic thermostat | Expired / Lapsed | 1967-04-05 | 1969-03-18 | 0 | Details |
| US3408899A | Fluidic operated rolling diaphragm actuator or the like | Expired / Lapsed | 1966-06-20 | 1968-11-05 | 0 | 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 |
| US3333086A | Temperature control apparatus and method | Expired / Lapsed | 1961-10-05 | 1967-07-25 | 2 | Details |
| US3310713A | Temperature control system | Expired / Lapsed | 1964-01-13 | 1967-03-21 | 2 | Details |
| US3293459A | Stepping motors and control means | Expired / Lapsed | 1964-04-30 | 1966-12-20 | 2 | Details |
| US3288370A | Fluid system and control device therefor or the like | Expired / Lapsed | 1963-10-08 | 1966-11-29 | 2 | Details |
| US3284724A | Oscillator with feedback bias amplitude stabilization | Expired / Lapsed | 1963-10-14 | 1966-11-08 | 2 | Details |
| US3270771A | Resilient disc check valve | Expired / Lapsed | 1963-06-11 | 1966-09-06 | 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 |
| US3211214A | Temperature control circuit | Expired / Lapsed | 1963-10-02 | 1965-10-12 | 2 | Details |
| US3199524A | Magnetically controlled exhalation valve | Expired / Lapsed | 1962-02-26 | 1965-08-10 | 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 |
| US3131718A | Pressure relief valve | Expired / Lapsed | 1960-09-14 | 1964-05-05 | 1 | 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 |
| US3092323A | Burner fuel control system | Expired / Lapsed | 1959-09-11 | 1963-06-04 | 2 | Details |
| US3078344A | Phase demodulation of keyed carrier by use of synchronous g… | Expired / Lapsed | 1960-10-25 | 1963-02-19 | 2 | Details |
| US3065462A | Scanning control system | Expired / Lapsed | 1958-10-07 | 1962-11-20 | 0 | Details |
| US3061823A | Differential pressure transmitter | Expired / Lapsed | 1957-09-13 | 1962-10-30 | 0 | Details |
| US3037079A | Receiver for phase shift keyed signals | Expired / Lapsed | 1960-04-08 | 1962-05-29 | 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 |
| US2982148A | Control device | Expired / Lapsed | 1957-09-30 | 1961-05-02 | 0 | Details |
| US2974742A | Motor vehicle door lock system | Expired / Lapsed | 1959-04-24 | 1961-03-14 | 0 | Details |
| US2955466A | Test probe | Expired / Lapsed | 1955-12-01 | 1960-10-11 | 0 | Details |
| US2946943A | Parallel component controller servosystem | Expired / Lapsed | 1956-02-20 | 1960-07-26 | 0 | Details |
| US2938540A | Quick acting fluid pressure actuated valve | Expired / Lapsed | 1957-07-17 | 1960-05-31 | 0 | Details |
| US2922858A | Magnetic switch | Expired / Lapsed | 1958-03-03 | 1960-01-26 | 0 | Details |
| US2897334A | Temperature control device | Expired / Lapsed | 1957-03-27 | 1959-07-28 | 0 | Details |
| US2897331A | Temperature control device | Expired / Lapsed | 1955-11-09 | 1959-07-28 | 0 | Details |
| US2888949A | Flow control device | Expired / Lapsed | 1957-04-25 | 1959-06-02 | 0 | Details |
| US2859024A | Condition responsive control for clothes driers and the like | Expired / Lapsed | 1955-07-28 | 1958-11-04 | 0 | Details |
| US2819362A | Switches | Expired / Lapsed | 1953-12-09 | 1958-01-07 | 0 | Details |
| US2806654A | Thermostatic control device | Expired / Lapsed | 1955-04-28 | 1957-09-17 | 0 | Details |
| US2800284A | Control and indicating device for fluid fuel burners | Expired / Lapsed | 1955-03-25 | 1957-07-23 | 0 | Details |
| US2778711A | Pen mechanisms | Expired / Lapsed | 1953-04-13 | 1957-01-22 | 0 | Details |
| US2704342A | Fluid level actuated follow-up mechanism | Expired / Lapsed | 1951-04-13 | 1955-03-15 | 0 | Details |
| US2635636A | Pilot-operated valve | Expired / Lapsed | 1949-10-10 | 1953-04-21 | 0 | Details |
| US2596812A | Water heater control | Expired / Lapsed | 1949-03-02 | 1952-05-13 | 0 | Details |
| US2591868A | Machine for sorting compressible elements | Expired / Lapsed | 1947-01-27 | 1952-04-08 | 0 | Details |
| US2584418A | Constant flow valve | Expired / Lapsed | 1948-04-19 | 1952-02-05 | 0 | Details |
| US2584458A | Thermostat safety control | Expired / Lapsed | 1946-01-14 | 1952-02-05 | 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 |
| US2471514A | Safety type thermostat | Expired / Lapsed | 1945-07-20 | 1949-05-31 | 0 | Details |
| US2466846A | Pressure measuring device | Expired / Lapsed | 1945-12-27 | 1949-04-12 | 0 | Details |
| US2466522A | Control device | Expired / Lapsed | 1946-02-09 | 1949-04-05 | 0 | Details |