Inventor
TAKEUCHI YOUJI
JP11 patents
⚠️ This page may combine multiple inventors who share the name “TAKEUCHI YOUJI”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
MITSUBISHI PENCIL KABUSHIKIKAI
4 patentsUS6827767B2Dec 7, 2004
Ink for ball-point pen and ball-point pen
MITSUBISHI PENCIL KABUSHIKIKAI4 citations62
US6376560B1Apr 23, 2002
Ink follower for water-base ballpoint pens and method of manufacturing the same
MITSUBISHI PENCIL KABUSHIKIKAI4 citations61
US6227738B1May 8, 2001
Method of manufacturing ink follower for water-base ballpoint pens
MITSUBISHI PENCIL KABUSHIKIKAI3 citations61
US6818047B2Nov 16, 2004
Ink for ball pen and ball pen
MITSUBISHI PENCIL KABUSHIKIKAI1 citations51