Inventor · disambiguated record
Sadao Minakawa
Also filed as: MINAKAWA SADAO
7 granted patents·73 citations·filing 1987–1990
84Inventor score
Files withHITACHI LTD7
Top patents by PatentIndex Score
7 records- 0186USD323437SControl table for spectro photometerHITACHI LTD·Filed 1989·Granted Jan 28, 1992·27 cites·1 claims
- 0259US5041727ASpectrophotometer with near infrared radiation sensor having an improved sensitivityHITACHI LTD·Filed 1990·Granted Aug 20, 1991·23 cites·18 claims
- 0348US4810872AOptical property measuring deviceHITACHI LTD·Filed 1987·Granted Mar 7, 1989·13 cites·9 claims
- 0434US4810089APhotoelastic effect measuring deviceHITACHI LTD·Filed 1987·Granted Mar 7, 1989·6 cites·10 claims
- 0533USD325176SSpectro photometerHITACHI LTD·Filed 1989·Granted Apr 7, 1992·1 cites·1 claims
- 0628US4981357ASpectrophotometer having functions of both a double-monochromater and a single-monochromaterHITACHI LTD·Filed 1989·Granted Jan 1, 1991·2 cites·5 claims
- 0727US5276499ASpectrophotometerHITACHI LTD·Filed 1990·Granted Jan 4, 1994·1 cites·7 claims
Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →