Howard H. Ferrell
4Patents
4h-index
7Co-inventors
43Inventor score
Filing activity: Nov 6, 1974 → Dec 3, 1987
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4833915A | Method and apparatus for detecting formation hydrocarbons in mud returns, and the like | Fixed Constructions | 39 | Expired |
| US3965978A | Subsurface transient pressure testing apparatus and method of use thereof | Fixed Constructions | 15 | Expired |
| US4107037A | Method and apparatus for automatic control of filtrate quality | Emerging Cross-Sectional Technologies | 10 | Expired |
| US4212748A | Polymer flood filtration improvement | Emerging Cross-Sectional Technologies | 9 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.