Inventor · disambiguated record
Hajime Umehara
Also filed as: UMEHARA HAJIME
12 granted patents·280 citations·filing 1984–1995
92Inventor score
Files withHITACHI LTD12
Top patents by PatentIndex Score
12 records- 0190US5663502AMethod and apparatus for measuring thickness of layer using acoustic wavesHITACHI LTD·Filed 1995·Granted Sep 2, 1997·116 cites·8 claims
- 0275US4842814ANuclear reactor fuel assemblyHITACHI LTD·Filed 1987·Granted Jun 27, 1989·18 cites·27 claims
- 0375US4689091AProcess for producing zirconium-based alloyHITACHI LTD·Filed 1985·Granted Aug 25, 1987·21 cites·19 claims
- 0471US4678521AProcess for producing zirconium-based alloy and the product thereofHITACHI LTD·Filed 1986·Granted Jul 7, 1987·29 cites·31 claims
- 0565US5388132ANuclear fuel assembly and coreHITACHI LTD·Filed 1993·Granted Feb 7, 1995·26 cites·21 claims
- 0663US5617456AFuel assembly and nuclear reactorHITACHI LTD·Filed 1995·Granted Apr 1, 1997·13 cites·1 claims
- 0763US5128098AFuel assemblyHITACHI LTD·Filed 1991·Granted Jul 7, 1992·14 cites·23 claims
- 0854US5265139AFuel assemblyHITACHI LTD·Filed 1992·Granted Nov 23, 1993·18 cites·14 claims
- 0952US5640435AFuel assembly and nuclear reactorHITACHI LTD·Filed 1994·Granted Jun 17, 1997·9 cites·14 claims
- 1050US4627148AMethod of producing high-purity metal memberHITACHI LTD·Filed 1984·Granted Dec 9, 1986·11 cites·10 claims
- 1132US4985199AFuel spacer of separate cell type and manufacturing method thereforHITACHI LTD·Filed 1988·Granted Jan 15, 1991·5 cites·9 claims
- 1229US4766658AMethod of producing composite nuclear fuel claddingHITACHI LTD·Filed 1986·Granted Aug 30, 1988·0 cites·7 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →