Inventor · disambiguated record
Masaaki Shigeyama
Also filed as: SHIGEYAMA MASAAKI
3 granted patents·9 citations·filing 2001–2006
60Inventor score
Files withHITACHI LTD3
Top patents by PatentIndex Score
3 records- 0158US6651567B2Railway carHITACHI LTD·Filed 2001·Granted Nov 25, 2003·7 cites·13 claims
- 0253US7601432B2Friction stir welding method and group of shape members for friction stir weldingHITACHI LTD·Filed 2006·Granted Oct 13, 2009·0 cites·7 claims
- 0345US7121450B2Friction stir welding method and group of shape members for friction stir weldingHITACHI LTD·Filed 2004·Granted Oct 17, 2006·2 cites·13 claims
Join the waitlist — get patent alerts
Get an alert when Masaaki Shigeyama files or is granted a new patent.
We store only your email — no account needed. See our privacy policy.
Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →