KO

Koichiro Oka

YC Yamamoto Kogaku Co.: 3 patents #1 of 14Top 8%
Overall (2011): #43,142 of 364,097Top 15%
3
Patents 2011

Issued Patents 2011

Showing 1–3 of 3 patents

Patent #TitleCo-InventorsDate
7901074 Lens for safety glasses Tamenobu Yamamoto, Yoshihisa Ishiba 2011-03-08
7891025 Protective device for eyes Hirokazu Kobayashi, Kimio Matsumoto 2011-02-22
7891806 Eyeglasses Mitsuhiro Shintani 2011-02-22