Inventor · disambiguated record
Masaaki Shirai
Also filed as: SHIRAI MASAAKI
4 granted patents·60 citations·filing 1996–1998
79Inventor score
Technology areasC02F
Files withHITACHI PLANT ENG & CONSTR CO4
Top patents by PatentIndex Score
4 records- 0169US5849180AMethod of biologically removing nitrogen and system thereforHITACHI PLANT ENG & CONSTR CO·Filed 1998·Granted Dec 15, 1998·24 cites·3 claims
- 0256US6033569AMethod of biologically removing nitrogen and system thereforHITACHI PLANT ENG & CONSTR CO·Filed 1998·Granted Mar 7, 2000·15 cites·2 claims
- 0351US5997736AMethod of biologically removing nitrogen and system thereforHITACHI PLANT ENG & CONSTR CO·Filed 1998·Granted Dec 7, 1999·12 cites·8 claims
- 0444US5876603AMethod of biologically removing nitrogen and system thereforHITACHI PLANT ENG & CONSTR CO·Filed 1996·Granted Mar 2, 1999·9 cites·3 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →