Inventor · disambiguated record
Yoshio Sumiya
Also filed as: SUMIYA YOSHIO
3 granted patents·23 citations·filing 1988–1993
67Inventor score
Files withHITACHI LTD3
Top patents by PatentIndex Score
3 records- 0145US4917176ADevice for cleaning inner surfaces of heat exchanger tubesHITACHI LTD·Filed 1988·Granted Apr 17, 1990·12 cites·17 claims
- 0236US5423377ACondenser for a steam turbine and a method of operating such a condenserHITACHI LTD·Filed 1993·Granted Jun 13, 1995·9 cites·8 claims
- 0325US5251690AApparatus for collecting cleaning bodies for tubular heat exchangerHITACHI LTD·Filed 1991·Granted Oct 12, 1993·2 cites·11 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →