Inventor · disambiguated record
Masaki Kumagai
Also filed as: KUMAGAI MASAKI
17 granted patents·6 pending applications·162 citations·filing 1992–2019
93Inventor score
Top patents by PatentIndex Score
23 records- 0191US7654435B2Rotary tool for friction stir spot welding and method of friction stir spot welding using the sameSUMITOMO LIGHT METAL IND·Filed 2007·Granted Feb 2, 2010·20 cites·18 claims
- 0285US9302343B2Process for spot-joining stacked metal foilsUACJ CORP·Filed 2014·Granted Apr 5, 2016·7 cites·8 claims
- 0382US7800011B2MIG welded joint between aluminum and steel members and MIG welding processSUMITOMO LIGHT METAL IND·Filed 2008·Granted Sep 21, 2010·12 cites·8 claims
- 0481US8742294B2MIG welded joint between aluminum and steel members and MIG welding processFUKUDA TOSHIHIKO·Filed 2008·Granted Jun 3, 2014·8 cites·8 claims
- 0581US7810700B2Heat treating friction stir welded aluminum alloy members and joined productSUMITOMO LIGHT METAL IND·Filed 2005·Granted Oct 12, 2010·5 cites·7 claims
- 0677US8028888B2Method of joining together end portions of superposed membersSUMITOMO LIGHT METAL IND·Filed 2006·Granted Oct 4, 2011·5 cites·10 claims
- 0773US7802716B2Method of manufacturing heat exchanger tube and heat exchangerDENSO CORP·Filed 2006·Granted Sep 28, 2010·4 cites·19 claims
- 0871US5382929AMonolithic crystal filterNDK NIHON DEMPA KOGYO COMPANY·Filed 1993·Granted Jan 17, 1995·30 cites·12 claims
- 0968US5372663APowder processing of titanium aluminide having superior oxidation resistanceSUMITOMO LIGHT METAL IND·Filed 1992·Granted Dec 13, 1994·29 cites·2 claims
- 1067US7802713B2Friction stir spot joining deviceKAWASAKI HEAVY IND LTD·Filed 2008·Granted Sep 28, 2010·2 cites·2 claims
- 1163US10016837B2Method of joining heat-treatable aluminum alloy members by friction stir weldingUACJ CORP·Filed 2016·Granted Jul 10, 2018·0 cites·15 claims
- 1258US2009250144A1Method of joining heat-treatable aluminum alloy members by friction stir weldingSUMITOMO LIGHT METAL IND·Filed 2009·Application pending·0 cites
- 1351US2007138239A1Method of joining heat-treatable aluminum alloy members by friction stir welding and joined product obtained by the method and used for press formingSUMITOMO LIGHT METAL IND·Filed 2005·Application pending·0 cites
- 1450US6892928B2Method of manufacturing tubular body, by friction stir weldingSUMITOMO LIGHT METAL IND·Filed 2003·Granted May 17, 2005·5 cites·4 claims
- 1549US5334814AElectrode for spot weldingSUMITOMO LIGHT METAL IND·Filed 1992·Granted Aug 2, 1994·13 cites·8 claims
- 1649US2008029581A1Method of joining together dissimilar metal membersSUMITOMO LIGHT METAL IND·Filed 2006·Application pending·0 cites
- 1747US5451366AProduct of a halogen containing Ti-Al system intermetallic compound having a superior oxidation and wear resistanceSUMITOMO LIGHT METAL IND·Filed 1993·Granted Sep 19, 1995·12 cites·7 claims
- 1846US2006236659A1Vertical filling-packaging device, and method of making bag by the deviceNIPPON SEIKI CO LTD·Filed 2004·Application pending·0 cites
- 1943US2019161830A1Highly corrosion resistant copper tubeUACJ CORP·Filed 2019·Application pending·0 cites
- 2042US6921010B2Method of joining together two planar members by friction stir welding, and tab plate used in the same methodSUMITOMO LIGHT METAL IND·Filed 2003·Granted Jul 26, 2005·2 cites·16 claims
- 2141US5391854AMethod of spot welding aluminum alloysSUMITOMO LIGHT METAL IND·Filed 1993·Granted Feb 21, 1995·8 cites·9 claims
- 2237US9193320B2Impact absorbing member and bumper deviceYAMADA YUTAKA·Filed 2012·Granted Nov 24, 2015·0 cites·20 claims
- 2336US2005172736A1Thickness detection device for filling and packaging bagFiled 2003·Application pending·0 cites
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →