Inventor · disambiguated record
Sumio Umezawa
Also filed as: SEKI SHIGEO · TATSUTA KUNIAKI · TSUCHIYA OSAMU · UMEZAWA HAMAO
59 granted patents·485 citations·filing 1973–2000
98Inventor score
Files withMICROBIAL CHEM RES FOUND35ZAIDAN HOJIN BISEIBUTSU14MEIJI SEIKA KAISHA5YAMANOUCHI PHARMA CO LTD4KOWA CO1
Top patents by PatentIndex Score
59 records- 0194US4196280ANovel macrolactone derivatives and process of producing themMICROBIAL CHEM RES FOUND·Filed 1978·Granted Apr 1, 1980·33 cites·14 claims
- 0289US6514946B1Macrolide antibiotics and treatment and prophylaxis of pasteurellosis using the sameZAIDAN HOJIN BISEIBUTSU·Filed 2000·Granted Feb 4, 2003·36 cites·7 claims
- 0389US3940382A1,2'-Di-N-substituted kanamycin B compoundsMICROBIAL CHEM RES FOUND·Filed 1974·Granted Feb 24, 1976·30 cites·5 claims
- 0488US4078138A3'-Epi-4'deoxykanamycin BMEIJI SEIKA KAISHA·Filed 1975·Granted Mar 7, 1978·25 cites·1 claims
- 0587US4170642ADerivatives of kanamycin AMICROBIAL CHEM RES FOUND·Filed 1975·Granted Oct 9, 1979·21 cites·8 claims
- 0686US4297485AProduction of a selectively protected N-acylated derivative of an aminoglycosidic antibioticMICROBIAL CHEM RES FOUND·Filed 1979·Granted Oct 27, 1981·24 cites·20 claims
- 0784US4107424A1-N-[(S)-α-hydroxy-ω-aminoacyl] derivatives of 3',4'-dideoxykanamycin B and 3'-deoxykanamycin B antibioticsMICROBIAL CHEM RES FOUND·Filed 1976·Granted Aug 15, 1978·25 cites·5 claims
- 0884US4091202AN-methanesulfonic acid derivatives of 3',4'-dideoxykanamycin BMICROBIAL CHEM RES FOUND·Filed 1976·Granted May 23, 1978·20 cites·1 claims
- 0984US3956274ANew compound 6'-deoxy-'-substituted or unsubstituted amino-lividomycins and the production thereofMICROBIAL CHEM RES FOUND·Filed 1974·Granted May 11, 1976·22 cites·9 claims
- 1082US4001208A1-N-[(S)-α-hydroxy-ω-aminoacyl]MICROBIAL CHEM RES FOUND·Filed 1973·Granted Jan 4, 1977·19 cites·9 claims
- 1180US4156078AProcess for the synthesis of 3',4'-dideoxykanamycin B and productsMICROBIAL CHEM RES FOUND·Filed 1976·Granted May 22, 1979·15 cites·20 claims
- 1276US4255564ANovel macrolactone derivatives and process of producing themMICROBIAL CHEM RES FOUND·Filed 1979·Granted Mar 10, 1981·8 cites·21 claims
- 1373US4438109ATylosin derivativesMICROBIAL CHEM RES FOUND·Filed 1981·Granted Mar 20, 1984·14 cites·15 claims
- 1472US4195170A3',4'-Episulfido kanamycin B compoundsMICROBIAL CHEM RES FOUND·Filed 1978·Granted Mar 25, 1980·11 cites·3 claims
- 1570US4008362A1-N-((S)-α-substituted-ω-aminoacyl)-neamine or -ribostamycin and the production thereofMEIJI SEIKA KAISHA·Filed 1973·Granted Feb 15, 1977·12 cites·6 claims
- 1667US4065616AProcesses for production of a 1-N-(α-hydroxy-Φ-amino alkanoyl)-3-deoxy-5-O-pentafuranosyl neamine and new compounds produced by the same processesMICROBIAL CHEM RES FOUND·Filed 1976·Granted Dec 27, 1977·9 cites·2 claims
- 1766US4147861A1N-(α-Hydroxy-ω-aminoalkanoyl)-6'N-methyl-3',4'-dideoxykanamycin B and the production thereofMICROBIAL CHEM RES FOUND·Filed 1977·Granted Apr 3, 1979·8 cites·5 claims
- 1864US4169939AProcesses for the production of 3',4'-dideoxykanamycin bMICROBIAL CHEM RES FOUND·Filed 1977·Granted Oct 2, 1979·8 cites·4 claims
- 1962US3939143A1-N-isoserylkanamycins and the production thereofMICROBIAL CHEM RES FOUND·Filed 1974·Granted Feb 17, 1976·8 cites·11 claims
- 2061US3948882AProcess for the production of a 1-N((S)-α-hydroxy-ω-aminoacyl)-3',4'-dideoxyneamine or -3',4'-dMICROBIAL CHEM RES FOUND·Filed 1974·Granted Apr 6, 1976·9 cites·2 claims
- 2159US4438107AAminoglycosides and use thereofKOWA CO·Filed 1982·Granted Mar 20, 1984·7 cites·4 claims
- 2258US4794173AMycaminosyl tylonolide derivativesYAMANOUCHI PHARMA CO LTD·Filed 1986·Granted Dec 27, 1988·6 cites·6 claims
- 2358US4104372A1-N-(α-hydroxy-ω-aminoalkanoyl) derivatives of 3'-deoxykanamycin A and the production thereofMICROBIAL CHEM RES FOUND·Filed 1976·Granted Aug 1, 1978·9 cites·7 claims
- 2456US4547492A1-N-(ω-Amino-α-hydroxyalkanoyl-2',3'-dideoxykanamycin A and pharmaceutical composition containing sameMICROBIAL CHEM RES FOUND·Filed 1984·Granted Oct 15, 1985·6 cites·4 claims
- 2556US4477443ATylosin derivatives, their preparation and pharmaceutical compositions containing themMICROBIAL CHEM RES FOUND·Filed 1982·Granted Oct 16, 1984·7 cites·18 claims
- 2655US5719130AAnthracycline derivative having a trifluoromethylated sugarZAIDAN HOJIN BISEIBUTSU·Filed 1995·Granted Feb 17, 1998·4 cites·10 claims
- 2755US5034517AProcess for producing 2,6-dideoxy-2-fluoro-L-talopyranoseZAIDAN HOJIN BISEIBUTSU·Filed 1990·Granted Jul 23, 1991·9 cites·1 claims
- 2854US4873225A1-n-(4-amino-3-fluoro-2-hydroxybutyryl)-kanamycinsMICROBIAL CHEM RES FOUND·Filed 1988·Granted Oct 10, 1989·7 cites·13 claims
- 2951US4060682AProcess for the synthetic production of 3-deoxy derivative of an aminoglycosidic antibioticMEIJI SEIKA KAISHA·Filed 1975·Granted Nov 29, 1977·8 cites·17 claims
- 3050US4125706ANovel process for the preparation of 1-N-(alpha-substituted-omega-aminoacyl)-3'-deoxyribostamycinMICROBIAL CHEM RES FOUND·Filed 1976·Granted Nov 14, 1978·4 cites·7 claims
- 3148US5886167A2'-deoxy-2'-epi-2'-fluorocoformycinZAIDAN HOJIN BISEIBUTSU·Filed 1997·Granted Mar 23, 1999·4 cites·1 claims
- 3247US5801257AAnthracycline derivative having a trifluoromethylated sugarZAIDAN HOJIN BISEIBUTSU·Filed 1997·Granted Sep 1, 1998·4 cites·4 claims
- 3347US5773607AProcesses for preparing 2'-deoxy-2'-fluorocoformycin and stereoisomers thereofZAIDAN HOJIN BISEIBUTSU·Filed 1996·Granted Jun 30, 1998·4 cites·2 claims
- 3446US4455419A2'-Modified kanamycins and production thereofMICROBIAL CHEM RES FOUND·Filed 1982·Granted Jun 19, 1984·4 cites·9 claims
- 3545US5831072AProcess for the preparation of 2'-deoxy-2'-halocoformycins or steroisomers thereofZAIDAN HOJIN BISEIBUTSU·Filed 1997·Granted Nov 3, 1998·6 cites·5 claims
- 3645US5096888A3-deoxy mycaminosyl tylonolide derivativesZAIDAN HOJIN BISEIBUTSU·Filed 1990·Granted Mar 17, 1992·5 cites·5 claims
- 3745US4349666AProcess for the production of kanomycin B derivatives and products obtained therefromMICROBIAL CHEM RES FOUND·Filed 1980·Granted Sep 14, 1982·4 cites·9 claims
- 3844US4298727A3',4'-Dideoxykanamycin A and 1-N-(S)-α-hydroxy-ω-aminoalkanoyl) derivatives thereofMICROBIAL CHEM RES FOUND·Filed 1980·Granted Nov 3, 1981·3 cites·6 claims
- 3944US4008218A1-N-((S)-α-substituted-ω-aminoacyl)-neamine or -ribostamycin and the production thereofMEIJI SEIKA KAISHA·Filed 1975·Granted Feb 15, 1977·3 cites·2 claims
- 4043US5541303A3,4'-dideoxymycaminosltylonolide derivative and process for producing the sameZAIDAN HOJIN BISEIBUTSU·Filed 1993·Granted Jul 30, 1996·4 cites·10 claims
- 4141US4359572AProcess for the production of 3'-deoxykanamycin A and intermediate productMICROBIAL CHEM RES FOUND·Filed 1981·Granted Nov 16, 1982·3 cites·3 claims
- 4241US4337336ADerivative of kanamycin A and a process for the preparation thereofMICROBIAL CHEM RES FOUND·Filed 1981·Granted Jun 29, 1982·3 cites·6 claims
- 4339US4634688A3'-fluoro-3'-deoxykanamycin AMICROBIAL CHEM RES FOUND·Filed 1985·Granted Jan 6, 1987·2 cites·2 claims
- 4439US4576931A23-C-Substituted mycaminosyl tylonolide, pharmaceutical compositions and method of useMICROBIAL CHEM RES FOUND·Filed 1985·Granted Mar 18, 1986·2 cites·13 claims
- 4536US6184365B1Anthracycline derivatives having 4-amino-2,4,6-trideoxy-2 fluoro-α-L-talopyranosyl groupZAIDAN HOJIN BISEIBUTSU·Filed 1997·Granted Feb 6, 2001·1 cites·3 claims
- 4636US4945081AMycaminosyl tylonolide derivativesYAMANOUCHI PHARMA CO LTD·Filed 1988·Granted Jul 31, 1990·1 cites·5 claims
- 4736US4169890APharmaceutical composition containing 5"-amino-3',5"-dideoxy-ribostamycin and intermediate compoundsMEIJI SEIKA KAISHA·Filed 1977·Granted Oct 2, 1979·1 cites·5 claims
- 4835US5101022AMycaminosyl tylonolide derivativesYAMANOUCHI PHARMA CO LTD·Filed 1991·Granted Mar 31, 1992·1 cites·1 claims
- 4935US4661474A2',3'-dideoxy-2'-fluorokanamycin A and 1-N-(α-hydroxy-ω-aminoalkanoyl) derivatives thereofMICROBIAL CHEM RES FOUND·Filed 1985·Granted Apr 28, 1987·1 cites·6 claims
- 5035US4357465A3',4'-Diedeoxykanamycin B derivativesMICROBIAL CHEM RES FOUND·Filed 1980·Granted Nov 2, 1982·2 cites·8 claims
Showing the top 50 of 59 patent records by PatentIndex Score.
Join the waitlist — get patent alerts
Get an alert when Sumio Umezawa files or is granted a new patent.
We store only your email — no account needed. See our privacy policy.
Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →