John H. Walker
12Patents
7h-index
19Co-inventors
63Inventor score
Filing activity: Jul 9, 1973 → Sep 22, 2015
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4212428A | Hydraulic power and control system for granular fertilizer spreaders | Fixed Constructions | 35 | Expired |
| US4012574A | Polymerization process | Chemistry; Metallurgy | 31 | Expired |
| US5555853A | Lightweight back-pack generator set having a spark-ignited engine operating on middle distillate fuels | Mechanical Engineering; Lighting; Heating | 20 | Expired |
| US4056669A | Polymerization process | Emerging Cross-Sectional Technologies | 14 | Expired |
| US4708203A | Composite drill collar | Fixed Constructions | 14 | Expired |
| US5891553A | Crosslinkable polymeric coatings and films and composite structures incorporating same | Emerging Cross-Sectional Technologies | 8 | Expired |
| US5009826A | Method of molding a composite drill collar | Fixed Constructions | 8 | Expired |
| US4544701A | Stamp molded paraffin scraper | Chemistry; Metallurgy | 6 | Expired |
| US9786152B1 | Septic overflow warning system | Emerging Cross-Sectional Technologies | 2 | Active |
| US4832137A | Method for protecting a pipe casing from a drill pipe string | Fixed Constructions | 2 | Expired |
| US4009295A | Printable anti-blocking resinous block copolymer | Chemistry; Metallurgy | 2 | Expired |
| US9162221B1 | Heterogeneous liquid phase catalytic process for the dehydration of monoethanolamine to ethylenimine | Performing Operations; Transporting | 0 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.