Inventor · disambiguated record
Rikio Chiziiwa
Also filed as: CHIZIIWA RIKIO
2 granted patents·17 citations·filing 1989–1990
60Inventor score
Technology areasC21D
Files withNIPPON STEEL CORP2
Top patents by PatentIndex Score
2 records- 0158US4990196AProcess for manufacturing building construction steel having excellent fire resistance and low yield ratioNIPPON STEEL CORP·Filed 1989·Granted Feb 5, 1991·8 cites·12 claims
- 0254US5147474ABuilding construction steel having excellent fire resistance and low yield ratioNIPPON STEEL CORP·Filed 1990·Granted Sep 15, 1992·9 cites·4 claims
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