Kengo Otsuka
12Patents
5h-index
31Co-inventors
66Inventor score
Filing activity: Jun 20, 1986 → Nov 4, 2011
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5405843A | Quinoline derivatives | Chemistry; Metallurgy | 34 | Expired |
| US5112817A | Quinoline derivatives | Chemistry; Metallurgy | 34 | Expired |
| US5204348A | Heterocyclic compounds and anticancer-drug potentiaters conaining them as effective components | Chemistry; Metallurgy | 27 | Expired |
| US5232923A | Catechol derivatives and pharmaceutical preparations containing same | Chemistry; Metallurgy | 17 | Expired |
| US8076478B2 | Polyamine derivative and polyol derivative | Chemistry; Metallurgy | 5 | Active |
| US4639521A | Isoquinoline derivatives | Chemistry; Metallurgy | 3 | Expired |
| US5532349A | Process for producing 1-(2'-deoxy-.beta.-D-erythro-pentofuranosyl)-5-trifluoromethyluracil derivatives | Chemistry; Metallurgy | 2 | Expired |
| US5434155A | Quinoline derivative fumarates | Human Necessities | 2 | Expired |
| US4782154A | Isoquinoline derivatives | Human Necessities | 1 | Expired |
| US5463061A | Process for production of glycide derivative | Chemistry; Metallurgy | 0 | Expired |
| US8354529B2 | Polyamine derivative and polyol derivative | Chemistry; Metallurgy | 0 | Active |
| US7026515B2 | Optically active amine derivatives and preparation process therefor | Chemistry; Metallurgy | 0 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.