KS

Kotaro Sumitomo

SP Sakura Color Products: 6 patents #16 of 115Top 15%
Overall (All Time): #860,055 of 4,157,543Top 25%
6
Patents All Time

Issued Patents All Time

Showing 1–6 of 6 patents

Patent #TitleCo-InventorsDate
8431632 Crayon Masamitsu Takahashi, Hidetoshi Fukuo 2013-04-30
8299143 Crayon and process for producing the same Masamitsu Takahashi, Hidetoshi Fukuo 2012-10-30
8242190 Crayon and process for producing the same Masamitsu Takahashi, Hidetoshi Fukuo 2012-08-14
7943684 Process for production of black crayon Masamitsu Takahashi, Hidetoshi Fukuo 2011-05-17
7485406 Photostorage solid drawing medium Hidetoshi Fukuo, Masamitsu Takahashi 2009-02-03
7291210 Solid drawing material and method for producing the same Keiko Nakamura, Hidetoshi Fukuo 2007-11-06