Inventor

KOKAWA HIROYUKI

JP2 patents

⚠️ This page may combine multiple inventors who share the name “KOKAWA HIROYUKI”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

HITACHI LTD

1 patent

US7703656B2Apr 27, 2010

Friction stir welding tool and friction stir welding apparatus

HITACHI LTD10 citations80

PARK SEUNGHWAN

1 patent

US8408444B2Apr 2, 2013

Friction stir tool

PARK SEUNGHWAN0 citations44