David E. Pearce
8Patents
7h-index
4Co-inventors
52Inventor score
Filing activity: Feb 21, 1989 → Nov 19, 1998
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4991671A | Means for mounting a roller cutter on a drill bit | Mechanical Engineering; Lighting; Heating | 49 | Expired |
| US5096005A | Hydraulic action for rotary drill bits | Fixed Constructions | 24 | Expired |
| US6109376A | Face seal having strain induced face geometry | Mechanical Engineering; Lighting; Heating | 20 | Expired |
| US5029656A | Nozzle means for rotary drill bits | Fixed Constructions | 16 | Expired |
| US5875861A | Different stiffness energizers for MF seals | Fixed Constructions | 16 | Expired |
| US5676214A | Flow channels for tooth type rolling cutter drill bits | Fixed Constructions | 13 | Expired |
| US4911255A | Means for retaining roller cutters on rotary drill bit | Fixed Constructions | 11 | Expired |
| US5465800A | Rolling cutter drill bits | Emerging Cross-Sectional Technologies | 6 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.