Fisher Controls LLC.
19Patents
0Active
19Granted
32Portfolio score
Filing activity: Aug 1, 1974 → Aug 19, 2004
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4108210A | Control valve trim assembly | Emerging Cross-Sectional Technologies | 53 | Expired |
| US4005848A | Bidirectional pressure-assisted valve seal | Mechanical Engineering; Lighting; Heating | 40 | Expired |
| US4402485A | Eccentrically nested tube gas line silencer | Mechanical Engineering; Lighting; Heating | 39 | Expired |
| US3960364A | High pressure tight shutoff valve seal | Mechanical Engineering; Lighting; Heating | 38 | Expired |
| US4231546A | High-temperature bidirectional metal seal | Mechanical Engineering; Lighting; Heating | 29 | Expired |
| US3951168A | Curtain valve | Emerging Cross-Sectional Technologies | 28 | Expired |
| US4362499A | Combustion control system and method | Mechanical Engineering; Lighting; Heating | 24 | Expired |
| US4137934A | Valve construction | Emerging Cross-Sectional Technologies | 23 | Expired |
| US4559832A | Piezoelectric pressure frequency sensor | Emerging Cross-Sectional Technologies | 22 | Expired |
| US4295489A | Pilot-operated back pressure regulator | Emerging Cross-Sectional Technologies | 15 | Expired |
| US4350047A | Vortex-shedding flowmeter having two bluff bodies | Physics | 14 | Expired |
| US5381817A | Mechanical flexure for motion amplification and transducer with same | Emerging Cross-Sectional Technologies | 14 | Expired |
| US4175283A | Batch option module | Physics | 10 | Expired |
| US4004601A | Quick closing emergency valve | Emerging Cross-Sectional Technologies | 9 | Expired |
| US7039537B2 | Detection and discrimination of instabilities in process control loops | Physics | 9 | Expired |
| US4148458A | Tight shutoff butterfly valve | Emerging Cross-Sectional Technologies | 9 | Expired |
| US4041973A | Quick change valve trim assembly | Emerging Cross-Sectional Technologies | 9 | Expired |
| US4453559A | Pneumatic controller | Emerging Cross-Sectional Technologies | 2 | Expired |
| US3991903A | Quick-disconnect valve closure structure | Emerging Cross-Sectional Technologies | 0 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.