Inventor · disambiguated record
Masao Koyama
Also filed as: KOYAMA MASAO
17 granted patents·250 citations·filing 1973–1999
94Inventor score
Top patents by PatentIndex Score
17 records- 0190US5037993ASulfonyl derivatives of an antibiotic substance isolated from streptomycesMEIJI SEIKA KAISHA·Filed 1990·Granted Aug 6, 1991·41 cites·4 claims
- 0290US4994578ACertain anti-tumor duocarmycin antibiotics from streptomycesMEIJI SEIKA KAISHA·Filed 1989·Granted Feb 19, 1991·44 cites·1 claims
- 0388US5747448ADerivatives of cyclodepsipeptide PF 1022MEIJI SEIKA KAISHA·Filed 1994·Granted May 5, 1998·44 cites·12 claims
- 0487US4563472AIodoallyl and iodopropargyl substituted tetrazoles and anti-microbial compositions thereofMEIJI SEIKA KAISHA·Filed 1982·Granted Jan 7, 1986·19 cites·14 claims
- 0579US4966918ADerivatives of chryosphanolSLOAN KETTERING INST CANCER·Filed 1989·Granted Oct 30, 1990·13 cites·10 claims
- 0678US4839378AFluorophthalimides and agricultural and horticultural fungicides containing themMEIJI SEIKA CO·Filed 1987·Granted Jun 13, 1989·15 cites·7 claims
- 0777US3963712A3-Halo-cephalosporinsMEIJI SEIKA KAISHA·Filed 1973·Granted Jun 15, 1976·9 cites·11 claims
- 0875US5053431ADerivatives of chrysophanol as topoisomerase II inhibitorsSLOAN KETTERING INST CANCER·Filed 1990·Granted Oct 1, 1991·15 cites·8 claims
- 0968US4495358AAntibiotic pyrrolomycin EMEIJI SEIKA KAISHA·Filed 1982·Granted Jan 22, 1985·11 cites·2 claims
- 1057US4647572AIodoallyl and iodopropargyl substituted tetrazoles and anti-microbial compositions thereofMEIJI SEIKA KAISHA·Filed 1983·Granted Mar 3, 1987·6 cites·4 claims
- 1152US6407112B1Optically active tetrahydrobenzindole derivativeMEIJI SEIKA KAISHA·Filed 1999·Granted Jun 18, 2002·6 cites·9 claims
- 1250US6355642B1Tetrahydrobenzindole compoundsMEIJI SEIKA KAISHA·Filed 1997·Granted Mar 12, 2002·12 cites·11 claims
- 1346US6498251B1Tetrahydrobenzindole derivativesMEIJI SEIKA KAISHA·Filed 1998·Granted Dec 24, 2002·9 cites·12 claims
- 1438US5210097AXanthocillin x monomethyl ether derivative and antitumor agent containing the sameMEIJI SEIKA KAISHA·Filed 1990·Granted May 11, 1993·1 cites·3 claims
- 1536US5164507AAntibiotic pyridine compoundMEIJI SEIKA KAISHA·Filed 1991·Granted Nov 17, 1992·2 cites·2 claims
- 1635US5312833AMethod of inhibiting tumor growth using xanthocillin X dimethyletherMEIJI SEIKA KAISHA·Filed 1991·Granted May 17, 1994·3 cites·9 claims
- 1731US4128714AProcess for the preparation of 7-acylamida-3-halo-3-alkyl-cepham-4-carboxylic acids and estersMEIJI SEIKA KAISHA·Filed 1976·Granted Dec 5, 1978·0 cites·8 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →