David A. Nelson
14Patents
7h-index
13Co-inventors
63Inventor score
Filing activity: Jul 3, 1978 → Dec 3, 2018
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5021696A | Cooling fan with reduced noise for variable speed machinery | Electricity | 34 | Expired |
| US7297263B2 | Efficient water filters | Chemistry; Metallurgy | 19 | Active |
| US6314834A | Hollow crank arm | Emerging Cross-Sectional Technologies | 19 | Expired |
| US7997179B1 | Hybrid water cannon | Mechanical Engineering; Lighting; Heating | 12 | Active |
| US4516302A | Field replaceable screw conveyor inserts | Emerging Cross-Sectional Technologies | 10 | Expired |
| US9069071B1 | GNSS navigation for a mechanized irrigation corner system | Human Necessities | 8 | Active |
| USD743448S1 | Cutting blade for rotary tool | General | 7 | Active |
| US4230977A | Speed control for electric motor | Electricity | 7 | Expired |
| US5210453A | Through bolt resonance suppression in an alternator | Electricity | 6 | Expired |
| US4419090A | Field replaceable screw conveyor inserts | Performing Operations; Transporting | 1 | Expired |
| US10125873B2 | Valve assembly with rotatable element | Mechanical Engineering; Lighting; Heating | 0 | Active |
| US8764298B2 | Locking thrust washer | Mechanical Engineering; Lighting; Heating | 0 | Active |
| US10478621B1 | Retractable lead systems | Physics | 0 | Active |
| US9855641B1 | Clamping device for precision tools | Mechanical Engineering; Lighting; Heating | 0 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.