Inventor · disambiguated record
Masahisa Oka
Also filed as: OKA MASAHISA · OKUMURA JUN
26 granted patents·221 citations·filing 1977–1998
96Inventor score
Files withBRISTOL MYERS CO18BRISTOL MYERS SQUIBB CO5TAKEDA CHEMICAL INDUSTRIES LTD2WACO PURE CHEMICAL IND1
Top patents by PatentIndex Score
26 records- 0186US4751295ACephalosporin derivativesBRISTOL MYERS CO·Filed 1986·Granted Jun 14, 1988·23 cites·7 claims
- 0279US5594091AMatrix for sustained-release preparationTAKEDA CHEMICAL INDUSTRIES LTD·Filed 1995·Granted Jan 14, 1997·48 cites·4 claims
- 0378US5665394AMatrix for sustained-release preparationTAKEDA CHEMICAL INDUSTRIES LTD·Filed 1996·Granted Sep 9, 1997·45 cites·10 claims
- 0473US5266600ABU-4641V, an antibacterial, antiviral and antitumor antibioticBRISTOL MYERS SQUIBB CO·Filed 1992·Granted Nov 30, 1993·30 cites·2 claims
- 0571US4151352A7-Amino-3-(2-carboxyalkyl-2,3-dihydro-s-triazolo[4,3-b]pyridazin-3-on-6-ylthiomethyl)-3-cephem-4-carboxylic acidsBRISTOL MYERS CO·Filed 1978·Granted Apr 24, 1979·5 cites·4 claims
- 0669US4507487AChemical compoundsBRISTOL MYERS CO·Filed 1983·Granted Mar 26, 1985·6 cites·3 claims
- 0768US4138554A7-[D-α-(4-Hydroxy-1,5-naphthyridine-3-carboxamido)-α-phenyl (and p-hydroxyphenyl)acetamido]-3-carbamoyloxymethyl-3-cephem-4-carboxylic acidsBRISTOL MYERS CO·Filed 1977·Granted Feb 6, 1979·5 cites·45 claims
- 0866US4394503ACephalosporin derivativesBRISTOL MYERS CO·Filed 1981·Granted Jul 19, 1983·5 cites·4 claims
- 0963US4777160ABU-2867T peptide antibioticsBRISTOL MYERS CO·Filed 1986·Granted Oct 11, 1988·7 cites·5 claims
- 1063US4198504A[3-(Pyridinium)-7-(naphthyiridinyl carbonylamino)acetamido]cephalosporanic acid derivativesBRISTOL MYERS CO·Filed 1978·Granted Apr 15, 1980·4 cites·62 claims
- 1161US4742047ASemi-synthetic peptide antibioticsBRISTOL MYERS CO·Filed 1986·Granted May 3, 1988·14 cites·11 claims
- 1261US4692510APeptide antibioticsBRISTOL MYERS CO·Filed 1986·Granted Sep 8, 1987·9 cites·4 claims
- 1346US4833076APeptide antibioticsBRISTOL MYERS CO·Filed 1987·Granted May 23, 1989·3 cites·6 claims
- 1445US4082912ACertain 7-acylamido-3-(2-carboxyalkyl-2,3-dihydro-s-triazolo[4,3-b]pyridazin-3-on-6-ylmethyl)-3-cephem-4-carboxylic acids their salts and easily hydrolyzed estersBRISTOL MYERS CO·Filed 1977·Granted Apr 4, 1978·1 cites·36 claims
- 1543US4898940APeptide antibioticsBRISTOL MYERS CO·Filed 1989·Granted Feb 6, 1990·2 cites·1 claims
- 1643US4474954AIntermediates for cephalosporin derivativesBRISTOL MYERS CO·Filed 1982·Granted Oct 2, 1984·1 cites·4 claims
- 1742US5025023APeptide antibioticsBRISTOL MYERS CO·Filed 1989·Granted Jun 18, 1991·2 cites·2 claims
- 1840US5096884AGlidobactin pf-1 peptide antibioticsBRISTOL MYERS SQUIBB CO·Filed 1990·Granted Mar 17, 1992·3 cites·2 claims
- 1939US4916063ABU-2867T peptide antibioticsBRISTOL MYERS CO·Filed 1987·Granted Apr 10, 1990·2 cites·2 claims
- 2038US4789731ASemi-synthetic peptide antibioticsBRISTOL MYERS CO·Filed 1987·Granted Dec 6, 1988·3 cites·4 claims
- 2137US5140101AAntiviral antibiotic BU-4344VBRISTOL MYERS SQUIBB CO·Filed 1990·Granted Aug 18, 1992·2 cites·2 claims
- 2237US4288590A7-[Dα-(4-Hydroxy-1,5-naphthyridine-3-carboxamido)-α-arylacetamido]-3-(N,N-dimethyl-aminomethylpyridinium) methyl-3-cephem-4-carboxylatesBRISTOL MYERS CO·Filed 1980·Granted Sep 8, 1981·1 cites·26 claims
- 2336US4198506A2-Carboxyalkyl-2,3-dihydro-6-mercapto-s-triazolo[4,3-b]-pyridazin-3-onesBRISTOL MYERS CO·Filed 1979·Granted Apr 15, 1980·0 cites·3 claims
- 2431US5079148APeptide antibioticsBRISTOL MYERS SQUIBB CO·Filed 1990·Granted Jan 7, 1992·0 cites·2 claims
- 2528US5256548AAntiviral antibiotic BU-4344VBRISTOL MYERS SQUIBB CO·Filed 1992·Granted Oct 26, 1993·0 cites·2 claims
- 2618US6013826AMethod formation of a carbon-carbon bondWACO PURE CHEMICAL IND·Filed 1998·Granted Jan 11, 2000·0 cites·17 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →