Akira Matsubara
18Patents
5h-index
32Co-inventors
62Inventor score
Filing activity: Nov 20, 1979 → Apr 17, 1995
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5447946A | Hydantoin derivatives for treating complications of diabetes | Chemistry; Metallurgy | 11 | Expired |
| US4740517A | Antidiabetic spiro-3-heteroazolidines | Chemistry; Metallurgy | 10 | Expired |
| US5338857A | Aminoketone derivatives of 1,2-oxazole and use thereof | Chemistry; Metallurgy | 7 | Expired |
| US4273932A | 4-Hydroxy-5,6,7,8-tetrahydroquinoline-3-carboxylic acids and derivatives | Chemistry; Metallurgy | 5 | Expired |
| US4760078A | Immunomodulator 1,2-dithiol-3-thione derivative composition, use method and process of producing the same | Chemistry; Metallurgy | 5 | Expired |
| US4263302A | Quinolinecarboxylic acid substituted penicillins and pharmaceutical compositions containing the same | Chemistry; Metallurgy | 4 | Expired |
| US4861792A | Hydantoin derivatives for treating complications of diabetes | Chemistry; Metallurgy | 3 | Expired |
| US5112841A | Imidazole derivatives and antiepileptics comprising said imidazole derivatives as effective ingredients | Chemistry; Metallurgy | 3 | Expired |
| US4283398A | Cephalosporins | Human Necessities | 1 | Expired |
| US4296112A | Cephalosporins | Human Necessities | 1 | Expired |
| US4978758A | Hydantoin derivatives for treating complications of diabetes | Chemistry; Metallurgy | 1 | Expired |
| US4985574A | Hydantoin derivatives for treating complications of diabetes | Chemistry; Metallurgy | 1 | Expired |
| US5001240A | Process for preparing optically active hydantoins | Chemistry; Metallurgy | 0 | Expired |
| US5602160A | Aminoketone derivatives and use thereof | Chemistry; Metallurgy | 0 | Expired |
| US5498619A | Aminoketone derivative and use thereof | Chemistry; Metallurgy | 0 | Expired |
| US5055585A | Preparation process of aminoketones | Chemistry; Metallurgy | 0 | Expired |
| US5194606A | Preparation process of aminoketones | Chemistry; Metallurgy | 0 | Expired |
| US4985573A | Hydantoin derivatives for treating complications of diabetes | Chemistry; Metallurgy | 0 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.