Inventor · disambiguated record
Tetsuji Yogo
Also filed as: YOGO TETSUJI
12 granted patents·4 pending applications·140 citations·filing 1988–2002
92Inventor score
Files withNGK SPARK PLUG CO16
Top patents by PatentIndex Score
16 records- 0178US5994250ASintered ceramic bodies and ceramic working toolsNGK SPARK PLUG CO·Filed 1998·Granted Nov 30, 1999·31 cites·12 claims
- 0276US6589448B2Ceramic ball for bearing and ceramic ball bearing using the sameNGK SPARK PLUG CO·Filed 2001·Granted Jul 8, 2003·15 cites·8 claims
- 0372US6508591B2Conductive ceramic bearing ball, ball bearing, motor having bearing, hard disk drive, and polygon scannerNGK SPARK PLUG CO·Filed 2001·Granted Jan 21, 2003·12 cites·15 claims
- 0469US6696376B2Zirconia containing ceramic ball, method for manufacturing same, ceramic ball bearing and check valveNGK SPARK PLUG CO·Filed 2001·Granted Feb 24, 2004·10 cites·14 claims
- 0566US6702466B2Ceramic dynamic-pressure bearing, motor having bearing, hard disk drive, polygon scanner, and method for manufacturing ceramic dynamic-pressure bearingNGK SPARK PLUG CO·Filed 2002·Granted Mar 9, 2004·12 cites·24 claims
- 0661US6619847B1Ceramic dynamic-pressure bearing, motor having bearing, hard disk drive, and polygon scannerNGK SPARK PLUG CO·Filed 2002·Granted Sep 16, 2003·11 cites·23 claims
- 0756US6659647B2Ceramic dynamic pressure bearing, motor with bearing, hard disk device, and polygon scannerNGK SPARK PLUG CO·Filed 2002·Granted Dec 9, 2003·5 cites·35 claims
- 0851US6619848B2Ceramic dynamic pressure bearing, motor with bearing, hard disc apparatus and polygon scannerNGK SPARK PLUG CO·Filed 2002·Granted Sep 16, 2003·5 cites·15 claims
- 0950US5916833ASintered ceramic bodies and ceramic metal working toolsNGK SPARK PLUG CO·Filed 1996·Granted Jun 29, 1999·12 cites·15 claims
- 1046US5106550AMethod of producing ceramic rotorNGK SPARK PLUG CO·Filed 1988·Granted Apr 21, 1992·11 cites·5 claims
- 1143US6464906B1Method of manufacturing spherical bodies by rotation, spherical bodies made by the method and a powder composition for use in the methodNGK SPARK PLUG CO·Filed 1999·Granted Oct 15, 2002·10 cites·21 claims
- 1243US2003008765A1High-purity alumina sintered body, high-purity alumina ball, jig for semiconductor, insulator, ball bearing, check valve, and method for manufacturing high-purity alumina sintered bodyNGK SPARK PLUG CO·Filed 2002·Application pending·0 cites
- 1341US2001054443A1High-purity alumina sintered body, high-purity alumina ball, jig for semiconductor, insulator, ball bearing, check value, and method for manufacturing high-purity alumina sintered bodyNGK SPARK PLUG CO·Filed 2001·Application pending·0 cites
- 1438US2002037803A1Silicon nitride sintered body, silicon nitride ball, silicon nitride bearing ball, ball bearing, motor having bearing, hard disk drive, and polygon scannerNGK SPARK PLUG CO·Filed 2001·Application pending·0 cites
- 1536US2002039459A1Ceramic ball, ball bearing, motor having bearing, hard disk drive, polygon scanner, and method for manufacturing ceramic ballNGK SPARK PLUG CO·Filed 2001·Application pending·0 cites
- 1635US5600867ACar kiln wheel having silicon nitride rotating membersNGK SPARK PLUG CO·Filed 1994·Granted Feb 11, 1997·6 cites·15 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →