Derek Litchfield
7Patents
5h-index
4Co-inventors
52Inventor score
Filing activity: Sep 10, 2004 → Nov 28, 2021
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| USD663326S1 | Cast closing wheel | General | 48 | Active |
| US7240627B1 | Crop debris clearing device | Emerging Cross-Sectional Technologies | 23 | Expired |
| US7832345B2 | Crop debris clearing device | Emerging Cross-Sectional Technologies | 17 | Active |
| US8752642B2 | Implement height adjuster | Emerging Cross-Sectional Technologies | 11 | Active |
| USD801396S1 | Seed furrow closing wheel | General | 7 | Active |
| US10462959B2 | Seed furrow closing wheel | Human Necessities | 1 | Active |
| USD987693S1 | Crop debris clearing disc | General | 1 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.