TO

Takeo Ohta

Sumitomo Electric Industries: 4 patents #41 of 2,038Top 3%
Overall (1997): #5,658 of 185,788Top 4%
4
Patents 1997

Issued Patents 1997

Showing 1–4 of 4 patents

Patent #TitleCo-InventorsDate
5681632 Optical information recording medium Hideki Kitaura, Tetsuya Akiyama, Ken'ichi Nagata, Katsumi Kawahara, Noboru Yamada 1997-10-28
5674649 Method of recording information Kazumi Yoshioka, Tetsuya Akiyama, Hidemi Isomura 1997-10-07
5665520 Optical recording medium Kazumi Yoshioka, Tetsuya Akiyama, Hidemi Isomura 1997-09-09
5610879 Optical reproducing device, optical reproducing method using the same, and optical record medium used in the same Mitsurou Moriya, Hiromichi Ishibashi, Yasuhiro Sugihara 1997-03-11