Carl M. Hoffmaster
19Patents
10h-index
20Co-inventors
72Inventor score
Filing activity: Dec 23, 1996 → Jan 13, 2023
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US7703557B2 | Fixed cutter bit with backup cutter elements on primary blades | Fixed Constructions | 52 | Active |
| US7621348B2 | Drag bits with dropping tendencies and methods for making the same | Fixed Constructions | 40 | Active |
| US6880650B2 | Advanced expandable reaming tool | Fixed Constructions | 33 | Expired |
| US8833492B2 | Cutters for fixed cutter bits | Fixed Constructions | 30 | Active |
| US8783387B2 | Cutter geometry for high ROP applications | Fixed Constructions | 23 | Active |
| US7451836B2 | Advanced expandable reaming tool | Fixed Constructions | 21 | Expired |
| US5839525A | Directional drill bit | Fixed Constructions | 21 | Expired |
| US7451837B2 | Advanced expandable reaming tool | Fixed Constructions | 15 | Expired |
| US6659207B2 | Bi-centered drill bit having enhanced casing drill-out capability and improved directional stability | Fixed Constructions | 15 | Expired |
| US8127863B2 | Drill bit having enhanced stabilization features and method of use thereof | Fixed Constructions | 14 | Active |
| US7798256B2 | Fixed cutter drill bit for abrasive applications | Fixed Constructions | 8 | Active |
| US8100202B2 | Fixed cutter bit with backup cutter elements on secondary blades | Fixed Constructions | 6 | Active |
| US9951563B2 | Wellbore mill having shear cutters and gouging cutters | Fixed Constructions | 6 | Active |
| US9145739B2 | Fixed cutter drill bit for abrasive applications | Fixed Constructions | 5 | Active |
| US9016407B2 | Drill bit cutting structure and methods to maximize depth-of-cut for weight on bit applied | Fixed Constructions | 1 | Active |
| US8689908B2 | Drill bit having enhanced stabilization features and method of use thereof | Fixed Constructions | 1 | Active |
| US10570664B2 | Wellbore reaming tool having shear cutters and gouging cutters | Fixed Constructions | 0 | Active |
| US12209459B2 | Wellbore reaming tool having fixed mounted gouging cutters | Fixed Constructions | 0 | Active |
| US11879295B2 | Gouging cutter drill bit | Performing Operations; Transporting | 0 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.