Robert Patrick Appleton
10Patents
7h-index
1Co-inventors
52Inventor score
Filing activity: Apr 9, 1985 → Feb 20, 2003
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US6742584B1 | Apparatus for facilitating the connection of tubulars using a top drive | Fixed Constructions | 125 | Expired |
| US5941309A | Actuating ball | Emerging Cross-Sectional Technologies | 76 | Expired |
| US5479988A | Mud check valves in drilling apparatus (wells) | Emerging Cross-Sectional Technologies | 51 | Expired |
| US5421421A | Apparatus for directional drilling | Fixed Constructions | 21 | Expired |
| US5806615A | Apparatus for use in a wellbore | Mechanical Engineering; Lighting; Heating | 18 | Expired |
| US6655477B2 | Friction-reducing drill pipe component | Fixed Constructions | 8 | Expired |
| US4545432A | Device for retrieving objects from wells | Fixed Constructions | 7 | Expired |
| US6230798A | Inflatable packer | Fixed Constructions | 6 | Expired |
| US7174958B2 | Drill string member | Emerging Cross-Sectional Technologies | 1 | Expired |
| US6325122A | Traction device for vehicle tire | Performing Operations; Transporting | 1 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.