Fischer and Porter Co
Fischer anActive Patents
0
Total Holdings
25
Patent Holdings
Filter in Explorer →| Patent No. | Title | Status | Filing Date | Grant Date | Claims | Actions |
|---|---|---|---|---|---|---|
| US4048854A | System for determining the ratio of oil to water in a meter… | Expired / Lapsed | 1976-09-17 | 1977-09-20 | 9 | Details |
| US3894433A | Rotameter system with electrical read-out | Expired / Lapsed | 1974-02-13 | 1975-07-15 | 15 | Details |
| US3885432A | Vortex-type mass flowmeters | Expired / Lapsed | 1973-08-02 | 1975-05-27 | 9 | Details |
| US3863172A | Common-mode rejection amplifying system | Expired / Lapsed | 1970-01-19 | 1975-01-28 | 4 | Details |
| US3776033A | Vortex-type mass flowmeters | Expired / Lapsed | 1972-03-06 | 1973-12-04 | 7 | Details |
| US3729995A | Pressure and temperature compensation system for flowmeter | Expired / Lapsed | 1971-08-26 | 1973-05-01 | 12 | Details |
| US3651452A | Fixed-frequency vehicle detector | Expired / Lapsed | 1970-04-17 | 1972-03-21 | 10 | Details |
| US3455162A | Turbine flowmeter transducer transmission system | Expired / Lapsed | 1967-01-24 | 1969-07-15 | 0 | Details |
| US3445643A | Electronic multiplier/divider for fluid flow systems | Expired / Lapsed | 1966-09-22 | 1969-05-20 | 2 | Details |
| US3353718A | Syringe, column or the like | Expired / Lapsed | 1966-05-24 | 1967-11-21 | 2 | Details |
| US3319216A | Connector for flat cables | Expired / Lapsed | 1965-03-25 | 1967-05-09 | 2 | Details |
| US3274833A | Differential pressure transmitters | Expired / Lapsed | 1963-04-23 | 1966-09-27 | 2 | Details |
| US3177711A | Turbine flowmeter | Expired / Lapsed | 1961-09-08 | 1965-04-13 | 0 | Details |
| US3147612A | Consistency measuring apparatus | Expired / Lapsed | 1962-09-14 | 1964-09-08 | 2 | Details |
| US3115777A | Mass flowmeter | Expired / Lapsed | 1958-10-21 | 1963-12-31 | 2 | Details |
| US3005978A | Electro-pneumatic data logger | Expired / Lapsed | 1955-12-01 | 1961-10-24 | 0 | Details |
| US2876985A | Rotary valves for laboratory glassware and the like | Expired / Lapsed | 1955-06-22 | 1959-03-10 | 0 | Details |
| US2662223A | Telemetering impedance bridge | Expired / Lapsed | 1949-07-22 | 1953-12-08 | 0 | Details |
| US2441350A | Rotameter and metering tube therefor | Expired / Lapsed | 1944-05-15 | 1948-05-11 | 0 | Details |
| US2419942A | Flow actuated switch | Expired / Lapsed | 1943-10-18 | 1947-05-06 | 0 | Details |
| US2412597A | Stopcock | Expired / Lapsed | 1944-03-01 | 1946-12-17 | 0 | Details |
| US2388672A | Flow measuring device | Expired / Lapsed | 1943-08-13 | 1945-11-13 | 0 | Details |
| US2377861A | Flowmeter | Expired / Lapsed | 1943-04-27 | 1945-06-12 | 0 | Details |
| US2333884A | Flow-indicating fluid meter | Expired / Lapsed | 1941-08-30 | 1943-11-09 | 0 | Details |
| US2313889A | Rotameter and the like | Expired / Lapsed | 1941-08-22 | 1943-03-16 | 0 | Details |