Inventor · disambiguated record
Hideyasu Umetsu
Also filed as: UMETSU HIDEYASU
3 granted patents·83 citations·filing 1997–1998
74Inventor score
Technology areasH02M
Files withHITACHI LTD3
Top patents by PatentIndex Score
3 records- 0167US5892674AMethod and apparatus for power converting AC into DC or DC into AC by converter having common phase connectionHITACHI LTD·Filed 1997·Granted Apr 6, 1999·40 cites·17 claims
- 0262US6084785AElectric power converterHITACHI LTD·Filed 1998·Granted Jul 4, 2000·31 cites·11 claims
- 0342US5959858AElectric power conversion apparatusHITACHI LTD·Filed 1997·Granted Sep 28, 1999·12 cites·20 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →