Inventor
SUMITA YUICHI
JP5 patents
⚠️ This page may combine multiple inventors who share the name “SUMITA YUICHI”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
NSK LTD
4 patentsUS6357923B1Mar 19, 2002
Rolling bearing and bearing device
NSK LTD33 citations91
US5906535AMay 25, 1999
Ball polishing method and apparatus, and annular groove forming method
NSK LTD13 citations71
US5520573AMay 28, 1996
Spherical member polishing apparatus
NSK LTD12 citations70
US6223635B1May 1, 2001
Method of forming annular grooves in a ball polishing apparatus
NSK LTD1 citations49