FI

Fumio Iizuka

PK Pentel Kabushiki Kaisha: 1 patents #76 of 170Top 45%
📍 Koshigaya, JP: #130 of 242 inventorsTop 55%
Overall (All Time): #3,975,224 of 4,157,543Top 100%
1
Patents All Time

Issued Patents All Time

Showing 1–1 of 1 patents

Patent #TitleCo-InventorsDate
4668572 Pencil lead composition with magnesium oxysulfate fibrous material Shin Shimoyama, Yoshiaki Abe 1987-05-26