John H. Ballard
5Patents
4h-index
7Co-inventors
39Inventor score
Filing activity: Sep 29, 1995 → Nov 6, 1997
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5902939A | Penetrometer sampler system for subsurface spectral analysis of contaminated media | Fixed Constructions | 29 | Expired |
| US5548115A | Probe device for detecting contaminants in subsurface media | Physics | 20 | Expired |
| US5635710A | Subsurface penetrometer radiaton sensor probe and system | Physics | 18 | Expired |
| US5744730A | Subsurface in-situ radon gas detection/penetrometer system | Fixed Constructions | 12 | Expired |
| US6047782A | Assembly and method for extracting discrete soil samples | Fixed Constructions | 4 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.