Assignee
YOSHIMURA HYOJI
JP·2 granted patents·14 citations·filing 2009–2010
Top patents by PatentIndex Score
2 records- 0187US8522434B2Method for production of valve head portion of hollow engine valve and hollow engine valveYOSHIMURA HYOJI·Filed 2009·Granted Sep 3, 2013·11 cites·3 claims
- 0278US8650752B2Method for manufacturing valve umbrella portion of hollow engine valve, press device of valve umbrella portion of hollow engine valve, and hollow engine valveYOSHIMURA HYOJI·Filed 2010·Granted Feb 18, 2014·3 cites·4 claims
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