Inventor · disambiguated record
Masao Koriyama
Also filed as: KORIYAMA MASAO
6 granted patents·80 citations·filing 1989–2004
83Inventor score
Top patents by PatentIndex Score
6 records- 0173US5220890AVariable compression device for two cycle diesel engineYAMAHA MOTOR CO LTD·Filed 1991·Granted Jun 22, 1993·30 cites·49 claims
- 0262US6125811AEngine cylinder blockYAMAHA MOTOR CO LTD·Filed 1998·Granted Oct 3, 2000·17 cites·12 claims
- 0356US4970996ATwo stroke diesel engineYAMAHA MOTOR CO LTD·Filed 1989·Granted Nov 20, 1990·14 cites·15 claims
- 0450US5934239APlated cylinder arrangementYAMAHA MOTOR CO LTD·Filed 1997·Granted Aug 10, 1999·12 cites·14 claims
- 0536US7765975B2Engine cylinder blockOWREIK PETROLIAM NAT BERHAD·Filed 2004·Granted Aug 3, 2010·2 cites·4 claims
- 0629US5666933ASleeveless cylinder block without marginal plating coatingYAMAHA MOTOR CO LTD·Filed 1995·Granted Sep 16, 1997·5 cites·6 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →