David Johnstone
5Patents
2h-index
3Co-inventors
44Inventor score
Filing activity: Mar 14, 1994 → Nov 25, 2014
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US6089517A | Stuffed creature mounting device | Mechanical Engineering; Lighting; Heating | 19 | Expired |
| US5489619A | Process for producing improved phenolic foams from phenolic resole resins | Chemistry; Metallurgy | 4 | Expired |
| US9302721B1 | Track driven sub-base assembly | Fixed Constructions | 1 | Active |
| US8550193B1 | Track driven sub-base assembly | Fixed Constructions | 0 | Active |
| US8905165B1 | Track driven sub-base assembly | Fixed Constructions | 0 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.