HT

Hajime Tazumi

KC Koyo Seiko Co.: 11 patents #29 of 749Top 4%
Overall (All Time): #470,777 of 4,157,543Top 15%
11
Patents All Time

Issued Patents All Time

Showing 1–11 of 11 patents

Patent #TitleCo-InventorsDate
6858100 Rolling bearing Hisashi Harada, Masao Goto 2005-02-22
6745472 Manufacturing method of steel ball for rolling bearing Yoshiki Fujita, Kazuyuki Nishikita, Hideji Yoshida 2004-06-08
6726728 Rolling bearing Tsuyoshi Okumura, Hiroyuki Miyazaki, Yoshitaka Nakagawa 2004-04-27
6547442 Rolling bearing Toshiharu Watanabe 2003-04-15
6394249 One-way clutch Yoshitaka Nakagawa, Junya Ooitsu, Masayuki Kitamura 2002-05-28
6343682 One-way clutch Tadahiro Terada, Yoshitaka Nakagawa, Hideki Fujiwara 2002-02-05
6311814 One-way clutch Yoshitaka Nakagawa, Tadahiro Terada, Hideki Fujiwara 2001-11-06
6138804 One-way clutch and auxiliary machine using the same Yoshitaka Nakagawa, Junya Ooitsu 2000-10-31
6116393 Pulley unit Junya Ooitsu, Yasuhito Tanaka, Yoshitaka Nakagawa 2000-09-12
6095301 Pulley unit Hideki Fujiwara, Yasuhito Tanaka, Yoshitaka Nakagawa, Junya Ooitsu 2000-08-01
5539844 Ball bearing cages and ball bearings Masayuki Kitamura, Hiroshi Ueno, Tsuyoshi Okumura, Shigetaka Ashida 1996-07-23