David G. Holliday
5Patents
4h-index
6Co-inventors
50Inventor score
Filing activity: May 24, 1991 → Jan 31, 2023
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US7195225B1 | Rotary valve assembly | Fixed Constructions | 12 | Expired |
| US6125874A | Gate valve having fail safe actuator | Emerging Cross-Sectional Technologies | 7 | Expired |
| US5127629A | Valve stem flex lip backseat | Mechanical Engineering; Lighting; Heating | 5 | Expired |
| US9103457B2 | Assembly having a dual barrier gasket | Mechanical Engineering; Lighting; Heating | 4 | Active |
| US12291939B2 | Electrical actuation of a valve in a wellhead assembly | Fixed Constructions | 0 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.