Inventor · disambiguated record
Katsuyoshi Iwamatsu
Also filed as: HISAMATSU TAKASHI · IWAMATSU KATSUYOSHI
33 granted patents·181 citations·filing 1974–2002
97Inventor score
Top patents by PatentIndex Score
33 records- 0177US6825187B2Carbapenem derivatives of quarternary salt typeMEIJI SEIKA KAISHA·Filed 2001·Granted Nov 30, 2004·12 cites·13 claims
- 0275US5061702ACephem compound as an antimicrobial agentMEIJI SEIKA CO·Filed 1989·Granted Oct 29, 1991·20 cites·4 claims
- 0371US6333328B1Serotonin 5-HT3 receptor partial activatorMEIJI SEIKA KAISHA·Filed 2000·Granted Dec 25, 2001·4 cites·1 claims
- 0470US4988686ACephem compounds and anti-bacterial agentMEIJI SEIKA CO·Filed 1989·Granted Jan 29, 1991·9 cites·2 claims
- 0569US6867226B2Serotonin 5-HT3 receptor partial activatorMEIJI SEIKA KAISHA·Filed 2002·Granted Mar 15, 2005·3 cites·1 claims
- 0668US6677331B2Carbapenem derivativesMEIJI SEIKA KAISHA·Filed 2002·Granted Jan 13, 2004·4 cites·24 claims
- 0768US5661144ACephem derivatives with 3-substituted bis heterocyclesMEIJI SEIKA CO·Filed 1995·Granted Aug 26, 1997·14 cites·8 claims
- 0866US4758557ACephalosporin derivatives and bactericides containing the sameMEIJI SEIKA KAISHA·Filed 1986·Granted Jul 19, 1988·8 cites·17 claims
- 0966US4357331A7αMethoxycephalosporin derivativesMEIJI SEIKA KAISHA·Filed 1979·Granted Nov 2, 1982·8 cites·7 claims
- 1063US6552057B2Serotonin 5-HT3 receptor partial activatorMEIJI SEIKA KAISHA·Filed 2001·Granted Apr 22, 2003·1 cites·3 claims
- 1163US4017607A9,3",4"-Triacyl ester of the antibiotic SF-837 M1 substance and the production thereofMEIJI SEIKA KAISHA·Filed 1975·Granted Apr 12, 1977·8 cites·8 claims
- 1259US5631257ABenzoxazole derivativesMEIJI SEIKA KAISHA·Filed 1995·Granted May 20, 1997·20 cites·9 claims
- 1359US4160026AAntibiotics SF-1130-x1 and -x2 substances and production and use thereofMEIJI SEIKA KAISHA·Filed 1977·Granted Jul 3, 1979·6 cites·11 claims
- 1458US4785090ACephalosporin derivativesMEIJI SEIKA KAISHA·Filed 1985·Granted Nov 15, 1988·5 cites·13 claims
- 1553US5827845ACephalosporin derivativeMEIJI SEIKA KAISHA·Filed 1994·Granted Oct 27, 1998·10 cites·8 claims
- 1651US6037342ASerotonin 5-HT3 receptor partial activatorMEIJI SEIKA KAISHA·Filed 1997·Granted Mar 14, 2000·7 cites·4 claims
- 1748US6458780B1Carbapenem derivativesMEIJI SEIKA KAISHA·Filed 1999·Granted Oct 1, 2002·7 cites·2 claims
- 1847US6297246B1Serotonin 5-HT3, receptor partial activatorMEIJI SEIKA KAISHA·Filed 1999·Granted Oct 2, 2001·5 cites·4 claims
- 1945US5990101ACarbapenem derivativesMEIJI SEIKA CO·Filed 1996·Granted Nov 23, 1999·4 cites·14 claims
- 2044US4302580AProcess for the production of a cephamycin derivativeMEIJI SEIKA KAISHA·Filed 1980·Granted Nov 24, 1981·3 cites·9 claims
- 2143US6310056B1Carbapenem derivativesMEIJI SEIKA KAISHA·Filed 1998·Granted Oct 30, 2001·6 cites·29 claims
- 2242US6180622B1Imidazo[5,1-b]thiazol-3-yl carbapenem antimicrobialsMEIJI SEIKA KAISHA·Filed 1997·Granted Jan 30, 2001·5 cites·12 claims
- 2338US5607927ACephalosporin derivativeMEIJI SEIKA KAISHA·Filed 1995·Granted Mar 4, 1997·3 cites·2 claims
- 2437US5075299ACephalosporin compounds and antibacterial agentsMEIJI SEIKA KAISHA·Filed 1989·Granted Dec 24, 1991·3 cites·15 claims
- 2536US5663162ACephem derivativesMEIJI SEIKA CO·Filed 1994·Granted Sep 2, 1997·1 cites·21 claims
- 2634US5028601ACephalosporin compounds and antibacterial agentsMEIJI SAIKA KAISHA LTD·Filed 1988·Granted Jul 2, 1991·1 cites·3 claims
- 2734US3959256A9-O-Alkanoyl-3"-O-alkanoyloxymethyl-SF-837 substance and the production thereofMEIJI SEIKA KAISHA·Filed 1974·Granted May 25, 1976·1 cites·12 claims
- 2832US5461044ACephalosporin derivativesMEIJI SEIKA KAISHA·Filed 1995·Granted Oct 24, 1995·1 cites·3 claims
- 2932US4325951A1-Oxadethiacephalosporin derivatives and antibacterial use thereofMEIJI SEIKA KAISHA·Filed 1980·Granted Apr 20, 1982·1 cites·10 claims
- 3032US4151041AProcess for production of maltopentaose and maltohexaoseMEIJI SEIKA KAISHA·Filed 1977·Granted Apr 24, 1979·1 cites·3 claims
- 3129US5464829ACephalosporin derivativesMEIJI SEIKA KAISHA·Filed 1993·Granted Nov 7, 1995·0 cites·4 claims
- 3228US5883089ACephem derivativesMEIJI SEIKA CO·Filed 1996·Granted Mar 16, 1999·0 cites·11 claims
- 3322US4324891AProcess for the production of a 7-methoxycephalosporine derivativeMEIJI SEIKA KAISHA·Filed 1980·Granted Apr 13, 1982·0 cites·1 claims
Join the waitlist — get patent alerts
Get an alert when Katsuyoshi Iwamatsu 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 →