Randy Johnston
5Patents
4h-index
18Co-inventors
50Inventor score
Filing activity: Oct 21, 1992 → Mar 8, 2010
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5362073A | Composite seal for rotary cone rock bits | Emerging Cross-Sectional Technologies | 31 | Expired |
| USRE36452E | Composite seal for rotary cone rock bits | General | 17 | Expired |
| US5825394A | Thermal print head calibration and operation method for fixed imaging elements | Performing Operations; Transporting | 5 | Expired |
| US8857933B2 | Ink supply reservoir | Performing Operations; Transporting | 4 | Active |
| US7866810B2 | Ink jet printer | Performing Operations; Transporting | 4 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.