Richard E. Hughes
14Patents
10h-index
4Co-inventors
61Inventor score
Filing activity: Aug 24, 1981 → Mar 6, 2000
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| USD287044S | Fluid control valve | General | 30 | Expired |
| USD297929S | Adjustable flow switch | General | 26 | Expired |
| US5183446A | Differential mechanism | Mechanical Engineering; Lighting; Heating | 24 | Expired |
| US4524024A | Processes of recovering fatty acids and sterols from tall oil pitch | Chemistry; Metallurgy | 22 | Expired |
| US6244291A | Process sampling selection valves | Emerging Cross-Sectional Technologies | 14 | Expired |
| US4412568A | Fill valve | Emerging Cross-Sectional Technologies | 14 | Expired |
| US4513184A | Flow actuated switch | Electricity | 14 | Expired |
| US4647891A | Encapsulated magnet and method of forming same | Emerging Cross-Sectional Technologies | 12 | Expired |
| USD418074S | Signal coupler unit | General | 11 | Expired |
| US5725695A | Method of making aluminum alloy foil and product therefrom | Chemistry; Metallurgy | 10 | Expired |
| USD287043S | Automatic fluid shutoff valve | General | 9 | Expired |
| USD304070S | Shut-off valve for specialty gases | General | 6 | Expired |
| USD295972S | Adjustable flow switch | General | 4 | Expired |
| US6125884A | Process sampling selection valves | Emerging Cross-Sectional Technologies | 3 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.