YT

Yoshito Tsumuraya

ML Mitsubishi Pencil Company, Limited: 1 patents #181 of 302Top 60%
Overall (All Time): #3,314,418 of 4,157,543Top 80%
1
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Issued Patents All Time

Showing 1–1 of 1 patents

Patent #TitleCo-InventorsDate
7473309 Water-based ink composition and ballpoint pen using the same — 2009-01-06