Inventor · disambiguated record
Tomoyuki Hirakawa
Also filed as: HIRAKAWA TOMOYUKI
2 granted patents·44 citations·filing 1989–1990
64Inventor score
Files withNIPPON KOKAN KK2
Top patents by PatentIndex Score
2 records- 0187US5031434APlug for manufacturing seamless steel pipeNIPPON KOKAN KK·Filed 1990·Granted Jul 16, 1991·31 cites·10 claims
- 0250US5030367AWater-dispersion lubricant of graphite, particulate resin and high molecular weight polybasic acid saltNIPPON KOKAN KK·Filed 1989·Granted Jul 9, 1991·13 cites·8 claims
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