Inventor · disambiguated record
Seishiro Hirakawa
Also filed as: HIRAKAWA SEISHIRO
2 granted patents·36 citations·filing 1975–1976
62Inventor score
Technology areasC25C
Files withMITSUI MINING & SMELTING CO2
Top patents by PatentIndex Score
2 records- 0175US4028211AApparatus for automatically replacing electrodes used for electrolytic refining of metalMITSUI MINING & SMELTING CO·Filed 1976·Granted Jun 7, 1977·24 cites·8 claims
- 0255US4026776AMethod for producing high purity leadMITSUI MINING & SMELTING CO·Filed 1975·Granted May 31, 1977·12 cites·2 claims
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