Inventor

MIZOGUCHI TATSUYA

JP3 patents

Patents

3 patents

US7001094B2Feb 21, 2006

Writing utensil having excellent cap-off performance

MITSUBISHI PENCIL CO5 citations59

US12559637B2Feb 24, 2026

Coloring tablet and water-based ink composition for writing instrument using the same

MITSUBISHI PENCIL CO0 citations57

US12168731B2Dec 17, 2024

Marking ink composition for writing board

MITSUBISHI PENCIL CO0 citations53