WY

Wataru Yokono

SP Sakura Color Products: 3 patents #35 of 115Top 35%
Overall (All Time): #1,661,099 of 4,157,543Top 40%
3
Patents All Time

Issued Patents All Time

Showing 1–3 of 3 patents

Patent #TitleCo-InventorsDate
5106881 Water base pigment ink compositions for use in marking pens Hiroshi Inoue, Yasuji Okuda 1992-04-21
5009536 Water base pigment ink compositions for use in marking pens Hiroshi Inoue, Yasuji Okuda 1991-04-23
4942185 Water base pigment ink compositions for use in marking pens Hiroshi Inoue, Yasuji Okuda 1990-07-17