Inventor · disambiguated record
Ryotatsu Otsuka
Also filed as: OTSUKA RYOTATSU
17 granted patents·1 pending application·654 citations·filing 1982–2005
95Inventor score
Top patents by PatentIndex Score
18 records- 0197US4804168AApparatus for treating molten metalSHOWA ALUMINUM CORP·Filed 1987·Granted Feb 14, 1989·154 cites·9 claims
- 0295US4611790ADevice for releasing and diffusing bubbles into liquidSHOWA ALUMINUM CORP·Filed 1985·Granted Sep 16, 1986·147 cites·5 claims
- 0394US4556419AProcess for treating molten aluminum to remove hydrogen gas and non-metallic inclusions therefromSHOWA ALUMINUM CORP·Filed 1984·Granted Dec 3, 1985·130 cites·8 claims
- 0489US4991647AHeat exchangerHONDA MOTOR CO LTD·Filed 1990·Granted Feb 12, 1991·68 cites·8 claims
- 0577US4747906AProcess and apparatus for purifying siliconSHOWA ALUMINUM CORP·Filed 1987·Granted May 31, 1988·25 cites·4 claims
- 0669US4469512AProcess for producing high-purity aluminumSHOWA ALUMINUM CORP·Filed 1982·Granted Sep 4, 1984·14 cites·8 claims
- 0768US7811356B2Method of purifying metalSHARP KK·Filed 2005·Granted Oct 12, 2010·1 cites·9 claims
- 0866US4772319AProcess for treating molten aluminum to remove hydrogen gas and non-metallic inclusions therefromSHOWA ALUMINUM CORP·Filed 1986·Granted Sep 20, 1988·12 cites·6 claims
- 0962US5736096AApparatus for purifying metalSHARP KK·Filed 1996·Granted Apr 7, 1998·15 cites·8 claims
- 1059US6109510ABrazing material for use in a low temperature brazing and method for low temperature brazingSHOWA ALUMINUM CORP·Filed 1998·Granted Aug 29, 2000·18 cites·6 claims
- 1157US5302342AAluminum alloy for heat exchangersHONDA MOTOR CO LTD·Filed 1993·Granted Apr 12, 1994·13 cites·2 claims
- 1255US5260142ACorrosion-resistant clad material made of aluminum alloysHONDA MOTOR CO LTD·Filed 1991·Granted Nov 9, 1993·25 cites·5 claims
- 1352US4854968AMethod of preparing high-purity metal and rotary cooling member for use in apparatus thereforSHOWA ALUMINUM CORP·Filed 1987·Granted Aug 8, 1989·7 cites·15 claims
- 1443US5862976ABrazeable aluminum alloy cast material and method of brazing the sameSHOWA ALUMINUM CORP·Filed 1996·Granted Jan 26, 1999·8 cites·8 claims
- 1542US2005139148A1Silicon purifying method, slag for purifying silicon and purified siliconFiled 2003·Application pending·0 cites
- 1639US4948102AMethod of preparing high-purity metal and rotary cooling member for use in apparatus thereforSHOWA ALUMINUM CORP·Filed 1988·Granted Aug 14, 1990·7 cites·1 claims
- 1737US6170738B1Aluminum brazing alloy for cold brazing and method for brazing low-melting aluminum materialSHOWA ALUMINUM CORP·Filed 1997·Granted Jan 9, 2001·7 cites·4 claims
- 1831US5934546AProcess for brazing die-cast aluminum materialSHOWA ALUMINUM CORP·Filed 1997·Granted Aug 10, 1999·3 cites·17 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →