Daniel E. Ruff
15Patents
9h-index
29Co-inventors
68Inventor score
Filing activity: Mar 27, 1998 → Sep 12, 2016
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US6460631B2 | Drill bits with reduced exposure of cutters | Fixed Constructions | 106 | Expired |
| US7096978B2 | Drill bits with reduced exposure of cutters | Fixed Constructions | 87 | Expired |
| US6779613B2 | Drill bits with controlled exposure of cutters | Fixed Constructions | 82 | Expired |
| US6571886B1 | Method and apparatus for monitoring and recording of the operating condition of a downhole drill bit during drilling operations | Fixed Constructions | 62 | Expired |
| US7066280B2 | Method and apparatus for monitoring and recording of the operating condition of a downhole drill bit during drilling operations | Fixed Constructions | 51 | Expired |
| US6935441B2 | Drill bits with reduced exposure of cutters | Fixed Constructions | 45 | Expired |
| US6098728A | Rock bit nozzle arrangement | Fixed Constructions | 16 | Expired |
| US7814990B2 | Drilling apparatus with reduced exposure of cutters and methods of drilling | Fixed Constructions | 13 | Active |
| US8172008B2 | Drilling apparatus with reduced exposure of cutters and methods of drilling | Fixed Constructions | 11 | Active |
| US7472764B2 | Rotary drill bit shank, rotary drill bits so equipped, and methods of manufacture | Fixed Constructions | 8 | Expired |
| US8066084B2 | Drilling apparatus with reduced exposure of cutters and methods of drilling | Fixed Constructions | 4 | Active |
| US7861806B2 | Shank structure for rotary drill bits | Fixed Constructions | 2 | Active |
| US7594454B2 | Methods of fabricating rotary drill bits | Fixed Constructions | 2 | Active |
| US10508323B2 | Method and apparatus for securing bodies using shape memory materials | Fixed Constructions | 1 | Active |
| US7600589B2 | Rotary drill bits | Fixed Constructions | 1 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.