Youji Takeuchi
9Patents
2h-index
21Co-inventors
47Inventor score
Filing activity: Dec 22, 1993 → Sep 14, 2010
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US7025907B2 | Carbon-containing lithium-iron composite phosphorus oxide for lithium secondary battery positive electrode active material and process for producing the same | Emerging Cross-Sectional Technologies | 22 | Expired |
| US5635307A | Thin-film electroluminescent element | Emerging Cross-Sectional Technologies | 4 | Expired |
| US6227738A | Method of manufacturing ink follower for water-base ballpoint pens | Performing Operations; Transporting | 2 | Expired |
| US6827767B2 | Ink for ball-point pen and ball-point pen | Chemistry; Metallurgy | 2 | Expired |
| US6376560B1 | Ink follower for water-base ballpoint pens and method of manufacturing the same | Emerging Cross-Sectional Technologies | 2 | Expired |
| US6391927B1 | Method for manufacturing ink follower for water base ballpoint pens | Emerging Cross-Sectional Technologies | 2 | Expired |
| US8507130B2 | Water based lithium secondary battery | Emerging Cross-Sectional Technologies | 1 | Active |
| US6818047B2 | Ink for ball pen and ball pen | Performing Operations; Transporting | 1 | Expired |
| US9209462B2 | Non-aqueous electrolyte solution type lithium ion secondary battery | Emerging Cross-Sectional Technologies | 0 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.