Derryl Schroeder
4Patents
3h-index
3Co-inventors
47Inventor score
Filing activity: Sep 27, 1990 → Oct 29, 2010
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5411106A | Method and apparatus for acquiring and identifying multiple sidewall core samples | Fixed Constructions | 38 | Expired |
| US5101104A | Carrier apparatus for radioactive well logging instrument | Fixed Constructions | 7 | Expired |
| US8539975B2 | Drill string valve and method | Emerging Cross-Sectional Technologies | 7 | Active |
| US8727040B2 | Drill string valve and method | Emerging Cross-Sectional Technologies | 1 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.