YI

Youichi Ishiguro

HO Hoya: 1 patents #757 of 1,290Top 60%
Sumitomo Electric Industries: 1 patents #13,249 of 21,551Top 65%
Overall (All Time): #2,209,735 of 4,157,543Top 55%
2
Patents All Time

Issued Patents All Time

Showing 1–2 of 2 patents

Patent #TitleCo-InventorsDate
6340226 Spectacles accommodating interchangeable/replaceable lens Toshihisa Akaba, Kazumichi Kurihara, Yasushi Sakai, Hakaru Fujita, Isao Iizuka +1 more 2002-01-22
5381261 Optical isolator Shigeru Hirai, Yasuji Hattori, Masayuki Nishimura, Masayuki Shigematsu, Minoru Watanabe +1 more 1995-01-10