David E. Fletcher
72Patents
6h-index
22Co-inventors
72Inventor score
Filing activity: May 24, 1994 → Jun 16, 2022
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| USD821302S1 | Venturi device | General | 14 | Active |
| US9534704B2 | Noise attenuation in a check valve unit or apparatus for producing vacuum | Emerging Cross-Sectional Technologies | 12 | Active |
| US9574677B2 | Solenoid-powered gate valve | Emerging Cross-Sectional Technologies | 9 | Active |
| USD780296S1 | Actuated valve | General | 8 | Active |
| US9599246B2 | Magnetically actuated shut-off valve | Electricity | 7 | Active |
| US9599234B1 | Sprung gate valve | Mechanical Engineering; Lighting; Heating | 7 | Active |
| US9919689B2 | Bypass valve in an apparatus for producing vacuum | Emerging Cross-Sectional Technologies | 6 | Active |
| US9915362B2 | Fluidic diode check valve | Mechanical Engineering; Lighting; Heating | 6 | Active |
| US9845899B2 | Sprung gate valves movable by an actuator | Mechanical Engineering; Lighting; Heating | 6 | Active |
| US9238388B2 | Tire pressure maintenance apparatus and system | Performing Operations; Transporting | 5 | Active |
| US5391118A | Belt tensioner, actuator therefor and methods of making the same | Mechanical Engineering; Lighting; Heating | 5 | Expired |
| USD802095S1 | Actuated valve | General | 5 | Active |
| USD840922S1 | Venturi device | General | 4 | Active |
| USD840920S1 | Venturi device | General | 4 | Active |
| USD843315S1 | Venturi device | General | 4 | Active |
| US9841110B2 | Sprung gate valves movable by a solenoid actuator | Emerging Cross-Sectional Technologies | 4 | Active |
| US9447697B2 | Wastegate valve and turbocharger having same | Emerging Cross-Sectional Technologies | 3 | Active |
| US10132424B2 | Variable flow valve having metered flow orifice | Emerging Cross-Sectional Technologies | 3 | Active |
| US9581060B2 | Evacuator system for supplying high suction vacuum or high suction flow rate | Emerging Cross-Sectional Technologies | 3 | Active |
| US9732871B2 | Aspirated relief valve for a turbocharging system | Emerging Cross-Sectional Technologies | 3 | Active |
| US10273978B2 | Low-cost evacuator for an engine having tuned Venturi gaps | Emerging Cross-Sectional Technologies | 3 | Active |
| USD840923S1 | Venturi device | General | 3 | Active |
| US9291094B2 | Variable flow valve having metered flow orifice | Emerging Cross-Sectional Technologies | 3 | Active |
| US10571030B2 | Valve gate within a Venturi gap of a Venturi device for producing vacuum | Mechanical Engineering; Lighting; Heating | 3 | Active |
| US10239187B2 | Methods for post-mold processing a Venturi device or check valve | Performing Operations; Transporting | 2 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.