Inventor
NIWA TOMONORI
JP13 patents
Patents
13 patentsUS5887620AMar 30, 1999
Porous ceramic material and producing method of same, and valve unit
NGK SPARK PLUG CO18 citations92
US6589448B2Jul 8, 2003
Ceramic ball for bearing and ceramic ball bearing using the same
NGK SPARK PLUG CO15 citations83
US5688728ANov 18, 1997
Porous ceramic material
NGK SPARK PLUG CO11 citations73
US6696376B2Feb 24, 2004
Zirconia containing ceramic ball, method for manufacturing same, ceramic ball bearing and check valve
NGK SPARK PLUG CO10 citations72
US6508591B2Jan 21, 2003
Conductive ceramic bearing ball, ball bearing, motor having bearing, hard disk drive, and polygon scanner
NGK SPARK PLUG CO12 citations72
US6464906B1Oct 15, 2002
Method of manufacturing spherical bodies by rotation, spherical bodies made by the method and a powder composition for use in the method
NGK SPARK PLUG CO10 citations72
US6315454B1Nov 13, 2001
Ceramic bearing ball
NGK SPARK PLUG CO11 citations72
US5994251ANov 30, 1999
Sintered ceramic mainly composed of alumina and a sintered ceramic part consisting of a sintered ceramic mainly composed of alumina
NGK SPARK PLUG CO10 citations72
US7029623B2Apr 18, 2006
Ceramic ball, ball bearing, motor having bearing, hard disk drive, polygon scanner, and method for manufacturing ceramic ball
NGK SPARK PLUG CO3 citations61
US6472075B1Oct 29, 2002
Sintered silicon nitride member and ceramic ball
NGK SPARK PLUG CO5 citations61
US5600867AFeb 11, 1997
Car kiln wheel having silicon nitride rotating members
NGK SPARK PLUG CO6 citations61
US9691652B2Jun 27, 2017
Carrier device and ceramic member
NGK SPARK PLUG CO0 citations38
US9276504B2Mar 1, 2016
Carrier device and ceramic member
NGK SPARK PLUG CO0 citations38