Inventor · disambiguated record
Keiji Ishibashi
Also filed as: ISHIBASHI KEIJI
15 granted patents·233 citations·filing 1989–1998
92Inventor score
Files withEISAI CO LTD15
Top patents by PatentIndex Score
15 records- 0197US5716993AAnthranilic acid derivativesEISAI CO LTD·Filed 1994·Granted Feb 10, 1998·116 cites·7 claims
- 0291US5849741AFused pyridazine compoundsEISAI CO LTD·Filed 1995·Granted Dec 15, 1998·50 cites·5 claims
- 0375US5607953AButenoic or propenoic acid derivativeEISAI CO LTD·Filed 1994·Granted Mar 4, 1997·13 cites·16 claims
- 0475US5382595AButenoic or propenoic acid derivativeEISAI CO LTD·Filed 1992·Granted Jan 17, 1995·13 cites·7 claims
- 0574US5047417AButenoic or propenoic acid derivativesEISAI CO LTD·Filed 1989·Granted Sep 10, 1991·12 cites·12 claims
- 0672US5177089AButenoic or propenoic acid derivativeEISAI CO LTD·Filed 1990·Granted Jan 5, 1993·11 cites·9 claims
- 0771US6218392B1Fused pyridazine compoundsEISAI CO LTD·Filed 1998·Granted Apr 17, 2001·14 cites·6 claims
- 0843US5292770AButenoic acid derivativesEISAI CO LTD·Filed 1992·Granted Mar 8, 1994·2 cites·4 claims
- 0939US5498634AThioformamide derivativesEISAI CO LTD·Filed 1995·Granted Mar 12, 1996·1 cites·6 claims
- 1038US5166188AButenoic acid derivativesEISAI CO LTD·Filed 1992·Granted Nov 24, 1992·1 cites·13 claims
- 1134US5478839ACyclohexane derivativesEISAI CO LTD·Filed 1994·Granted Dec 26, 1995·0 cites·9 claims
- 1234US5444066AThioformamide derivatives having hypotensive activityEISAI CO LTD·Filed 1992·Granted Aug 22, 1995·0 cites·6 claims
- 1334US5430059AButenoic acid derivativesEISAI CO LTD·Filed 1993·Granted Jul 4, 1995·0 cites·17 claims
- 1433US5606061AThioformamide derivativesEISAI CO LTD·Filed 1995·Granted Feb 25, 1997·0 cites·2 claims
- 1530US5605907ACyclohexane derivativesEISAI CO LTD·Filed 1995·Granted Feb 25, 1997·0 cites·3 claims
Join the waitlist — get patent alerts
Get an alert when Keiji Ishibashi 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 →