Inventor · disambiguated record
Koji Tsukuma
Also filed as: TSUKUMA KOJI
30 granted patents·1 pending application·603 citations·filing 1984–2014
97Inventor score
Top patents by PatentIndex Score
31 records- 0196US4587225AHigh-strength zirconia type sintered bodyTOYO SODA MFG CO LTD·Filed 1984·Granted May 6, 1986·132 cites·2 claims
- 0292US8722555B2High-strength transparent zirconia sintered body, process for producing the same, and uses thereofYAMASHITA ISAO·Filed 2010·Granted May 13, 2014·12 cites·12 claims
- 0392US7538055B2Transparent zirconia sintered bodyTOSOH CORP·Filed 2007·Granted May 26, 2009·26 cites·15 claims
- 0491US8815760B2Transparent zirconia sintered body, method for producing same, and use of sameWATANABE MASAHIRO·Filed 2010·Granted Aug 26, 2014·9 cites·12 claims
- 0591US4758541AZirconia sintered body of improved light transmittanceTOYO SODA MFG CO LTD·Filed 1986·Granted Jul 19, 1988·50 cites·4 claims
- 0688US9249058B2High-strength transparent zirconia sintered body, process for producing the same, and uses thereofYAMASHITA ISAO·Filed 2014·Granted Feb 2, 2016·10 cites·5 claims
- 0786US8785008B2Zirconia sintered bodies with high total light transmission and high strength, uses of the same, and process for producing the sameYAMASHITA ISAO·Filed 2007·Granted Jul 22, 2014·11 cites·8 claims
- 0886US7888279B2High toughness translucent alumina sintered body, method for producing the same, and its usesTOSOH CORP·Filed 2008·Granted Feb 15, 2011·10 cites·6 claims
- 0982US4915625ACeramic orthodontic bracketTOSOH CORP·Filed 1988·Granted Apr 10, 1990·38 cites·4 claims
- 1081US4938788AMethod of producing uniform silica glass blockTOSOH CORP·Filed 1988·Granted Jul 3, 1990·29 cites·18 claims
- 1179US8481439B2Colored alumina sintered body of high toughness and high translucency, and its production method and its usesYAMASHITA ISAO·Filed 2009·Granted Jul 9, 2013·5 cites·15 claims
- 1277US9249057B2Red light transmitting zirconia sintered body, method for producing the same, member comprising the sintered body, and jewelry goods and exterior component using the memberTSUKUMA KOJI·Filed 2011·Granted Feb 2, 2016·3 cites·16 claims
- 1377US5585173AHigh-purity, opaque quartz glass, method for producing same and use thereofTOSOH CORP·Filed 1994·Granted Dec 17, 1996·40 cites·17 claims
- 1475US7217406B2Lithium-manganese composite oxide granular secondary particle, method for production thereof and use thereofTOSOH CORP·Filed 2003·Granted May 15, 2007·11 cites·11 claims
- 1574US5972488AOpaque quartz glass and process for production thereofTOSOH CORP·Filed 1997·Granted Oct 26, 1999·37 cites·5 claims
- 1673US4774041AHigh-strength zirconia type sintered body and process for preparation thereofTOYO SODA MFG CO LTD·Filed 1985·Granted Sep 27, 1988·22 cites·9 claims
- 1772US4690910ASintered product of zirconia and method of producing the sameTOYO SODA MFG CO LTD·Filed 1985·Granted Sep 1, 1987·22 cites·2 claims
- 1871US8133051B2Orthodontic bracket and process for producing the sameTSUKUMA KOJI·Filed 2005·Granted Mar 13, 2012·3 cites·13 claims
- 1971US4666467AHigh-strength metal working tool made of a zirconia-type sintered materialTOYO SODA MFG CO LTD·Filed 1985·Granted May 19, 1987·24 cites·3 claims
- 2068US5665133AProcess for production of pure transparent quartzTOSOH CORP·Filed 1995·Granted Sep 9, 1997·32 cites·5 claims
- 2166US9919971B2Zirconia sintered body and use thereofTOSOH CORP·Filed 2014·Granted Mar 20, 2018·1 cites·14 claims
- 2265US9174877B2Colored translucent zirconia sintered body, its production process and its useYAMAUCHI SHOICHI·Filed 2011·Granted Nov 3, 2015·1 cites·11 claims
- 2362US6133178AHigh purity transparent silica glassTOSOH CORP·Filed 1998·Granted Oct 17, 2000·24 cites·2 claims
- 2460US6405563B1Opaque silica glass article having transparent portion and process for producing sameTOSOH CORP·Filed 2001·Granted Jun 18, 2002·8 cites·6 claims
- 2559US10682831B2Composite plate and method for producing sameTOSOH CORP·Filed 2013·Granted Jun 16, 2020·0 cites·15 claims
- 2657US10696022B2Composite plate and production method thereforTOSOH CORP·Filed 2013·Granted Jun 30, 2020·0 cites·12 claims
- 2756US8215019B2Process for producing an orthodontic bracketTSUKUMA KOJI·Filed 2008·Granted Jul 10, 2012·0 cites·9 claims
- 2856US5229336AMethod of producing oxynitride glassTOSOH CORP·Filed 1991·Granted Jul 20, 1993·17 cites·6 claims
- 2956US5028967AAchromatic lens for ultraviolet raysTOSOH CORP·Filed 1990·Granted Jul 2, 1991·18 cites·12 claims
- 3040US2012212890A1Cover and electronic deviceHOSHINO HIRONARI·Filed 2012·Application pending·0 cites
- 3138US6312775B1Opaque silica glass article having transparent portion and process for producing sameTOSOH QUARTZ CORP·Filed 1998·Granted Nov 6, 2001·8 cites·3 claims
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