Inventor · disambiguated record

Akihiko Niizawa

Also filed as: NIIZAWA AKIHIKO

3 granted patents·8 citations·filing 1991–1993

61Inventor score

Technology areasG01N

Files withNIPPON PETROLEUM REFINING CO3

Top patents by PatentIndex Score

3 records

0129US5139330AStandard samples and methods of instrumental measurement of astm color of petroleum products using said samplesNIPPON PETROLEUM REFINING CO·Filed 1991·Granted Aug 18, 1992·4 cites·4 claims
0228US5139329AStandard samples and methods of instrumental measurement of saybolt color of petroleum products using said samplesNIPPON PETROLEUM REFINING CO·Filed 1991·Granted Aug 18, 1992·3 cites·4 claims
0325US5381227AStandard materials and methods for instrumental measurement for ASTM color of petroleum products using said standard materialsNIPPON PETROLEUM REFINING CO·Filed 1993·Granted Jan 10, 1995·1 cites·2 claims

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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →