Inventor
KIRITA KAZUHISA
JP5 patents
Patents
5 patentsUS6659672B1Dec 9, 2003
Writing implement
MITSUBISHI PENCIL CO23 citations88
US6517273B2Feb 11, 2003
Free-ink type writing instrument
MITSUBISHI PENCIL CO12 citations71
USD449071SOct 9, 2001
Tip for a marking pen
MITSUBISHI PENCIL CO6 citations69
US7063475B2Jun 20, 2006
Ink-storing body for writing utensil
MITSUBISHI PENCIL CO2 citations61
US6443649B1Sep 3, 2002
Free-ink type writing instrument
MITSUBISHI PENCIL CO0 citations49