Ralph W. Hill
8Patents
4h-index
4Co-inventors
50Inventor score
Filing activity: Aug 26, 1974 → Jan 21, 2020
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4054155A | Hydraulic actuated control valve | Emerging Cross-Sectional Technologies | 18 | Expired |
| US3990711A | Restrained elastomeric seal ring means | Emerging Cross-Sectional Technologies | 13 | Expired |
| US3951170A | Fluid control valve | Emerging Cross-Sectional Technologies | 9 | Expired |
| US10174948B2 | Combustion staging system | Mechanical Engineering; Lighting; Heating | 9 | Active |
| US7819623B2 | Clearance control apparatus | Mechanical Engineering; Lighting; Heating | 4 | Active |
| US10683811B2 | Combustion staging system | Mechanical Engineering; Lighting; Heating | 1 | Active |
| US11313245B2 | Shaft monitoring system | Mechanical Engineering; Lighting; Heating | 1 | Active |
| US11230980B2 | Fault-accommodating flow scheduling valve | Emerging Cross-Sectional Technologies | 0 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.