Inventor
NAKATANI YASUNORI
JP12 patents
⚠️ This page may combine multiple inventors who share the name “NAKATANI YASUNORI”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
SAKURA COLOR PROD CORP
9 patentsUS6422776B1Jul 23, 2002
Ball-point pen and a penpoint tip therein
SAKURA COLOR PROD CORP19 citations91
US6299376B1Oct 9, 2001
Ball-point pen
SAKURA COLOR PROD CORP17 citations83
US5022775AJun 11, 1991
Writing inplement with magnetic closure
SAKURA COLOR PROD CORP21 citations81
US6332728B1Dec 25, 2001
Ball for ball-point pen
SAKURA COLOR PROD CORP9 citations72
US6283662B1Sep 4, 2001
Ink applicator, ink backflow prevention mechanism of ink applicator, and a pen tip
SAKURA COLOR PROD CORP9 citations72
US7914222B2Mar 29, 2011
Tip unit for liquid applicator, method for producing the same, and liquid applicator having the tip unit
SAKURA COLOR PROD CORP5 citations71
US7538148B2May 26, 2009
Aqueous ink composition
SAKURA COLOR PROD CORP5 citations71
US6706101B1Mar 16, 2004
Double-color ink and writing utensil containing the same
SAKURA COLOR PROD CORP3 citations62
US7721402B2May 25, 2010
Method of producing applicator tip
SAKURA COLOR PROD CORP3 citations60