TY

Tetsuji Yogo

Ngk Spark Plug Co.: 5 patents #4 of 151Top 3%
Overall (2003): #7,641 of 273,478Top 3%
5
Patents 2003

Issued Patents 2003

Showing 1–5 of 5 patents

Patent #TitleCo-InventorsDate
6659647 Ceramic dynamic pressure bearing, motor with bearing, hard disk device, and polygon scanner Atsutoshi Sugiyama, Hironobu Ishikawa 2003-12-09
6619847 Ceramic dynamic-pressure bearing, motor having bearing, hard disk drive, and polygon scanner Hironobu Ishikawa 2003-09-16
6619848 Ceramic dynamic pressure bearing, motor with bearing, hard disc apparatus and polygon scanner Hironobu Ishikawa, Takayoshi Morishita 2003-09-16
6589448 Ceramic ball for bearing and ceramic ball bearing using the same Tomonori Niwa 2003-07-08
6508591 Conductive ceramic bearing ball, ball bearing, motor having bearing, hard disk drive, and polygon scanner Tomonori Niwa 2003-01-21