Inventor · disambiguated record
Hisao Hasegawa
Also filed as: HASEGAWA HISAO
5 granted patents·46 citations·filing 1985–1992
79Inventor score
Top patents by PatentIndex Score
5 records- 0156US4796798AMethod of and apparatus for continuous production of seam-welded metal tubingKAWASAKI HEAVY IND LTD·Filed 1987·Granted Jan 10, 1989·18 cites·19 claims
- 0241US5202546ARoot pass bead welding methodKAWASAKI IND·Filed 1991·Granted Apr 13, 1993·12 cites·4 claims
- 0336US5244356AHydraulic piston apparatusDAIICHI ELECTRIC KABUSHIKI KAI·Filed 1992·Granted Sep 14, 1993·9 cites·4 claims
- 0435US4717065AMethod for manufacturing welded pipesKAWASAKI HEAVY IND LTD·Filed 1985·Granted Jan 5, 1988·5 cites·3 claims
- 0528US4916853AMethod for manufacturing welded pipesMATSUI SHIGETOMO·Filed 1987·Granted Apr 17, 1990·2 cites·7 claims
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