Inventor · disambiguated record
Tomonori Niwa
Also filed as: NIWA TOMONORI
13 granted patents·6 pending applications·111 citations·filing 1994–2015
91Inventor score
Files withNGK SPARK PLUG CO19
Top patents by PatentIndex Score
19 records- 0176US6589448B2Ceramic ball for bearing and ceramic ball bearing using the sameNGK SPARK PLUG CO·Filed 2001·Granted Jul 8, 2003·15 cites·8 claims
- 0272US6508591B2Conductive 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
- 0370US6315454B1Ceramic bearing ballNGK SPARK PLUG CO·Filed 2000·Granted Nov 13, 2001·11 cites·5 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
- 0564US5887620APorous ceramic material and producing method of same, and valve unitNGK SPARK PLUG CO·Filed 1997·Granted Mar 30, 1999·18 cites·10 claims
- 0660US6472075B1Sintered silicon nitride member and ceramic ballNGK SPARK PLUG CO·Filed 2000·Granted Oct 29, 2002·5 cites·16 claims
- 0751US5688728APorous ceramic materialNGK SPARK PLUG CO·Filed 1995·Granted Nov 18, 1997·11 cites·6 claims
- 0848US7029623B2Ceramic ball, ball bearing, motor having bearing, hard disk drive, polygon scanner, and method for manufacturing ceramic ballNGK SPARK PLUG CO·Filed 2001·Granted Apr 18, 2006·3 cites·2 claims
- 0947US5994251ASintered ceramic mainly composed of alumina and a sintered ceramic part consisting of a sintered ceramic mainly composed of aluminaNGK SPARK PLUG CO·Filed 1997·Granted Nov 30, 1999·10 cites·22 claims
- 1043US6464906B1Method 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
- 1143US2003008765A1High-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
- 1241US2001054443A1High-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
- 1340US2003139279A1Zirconia sintered body, abrasion-resistant member, bearing ball, and member for optical connectorNGK SPARK PLUG CO·Filed 2003·Application pending·0 cites
- 1439US9691652B2Carrier device and ceramic memberNGK SPARK PLUG CO·Filed 2013·Granted Jun 27, 2017·0 cites·9 claims
- 1539US9276504B2Carrier device and ceramic memberNGK SPARK PLUG CO·Filed 2013·Granted Mar 1, 2016·0 cites·6 claims
- 1638US2002037803A1Silicon 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
- 1736US2002039459A1Ceramic 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
- 1835US5600867ACar kiln wheel having silicon nitride rotating membersNGK SPARK PLUG CO·Filed 1994·Granted Feb 11, 1997·6 cites·15 claims
- 1927US2016099163A1Semiconductor manufacturing equipment component and method of making the sameNGK SPARK PLUG CO·Filed 2015·Application pending·0 cites
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →