SO

Sakae Ohta

HI Hitachi: 2 patents #13,388 of 28,497Top 50%
Ricoh Company: 2 patents #5,693 of 9,818Top 60%
Overall (All Time): #1,298,851 of 4,157,543Top 35%
4
Patents All Time

Issued Patents All Time

Showing 1–4 of 4 patents

Patent #TitleCo-InventorsDate
5162163 Magnetic recording medium having a lubricant film consisting of a mixture of two lubricants and which has two peaks of molecular weight Hiroyuki Matsumoto, Miyuki Kajiki, Makoto Komatsu, Kenzo Masuda, Fumio Nakano 1992-11-10
4792497 Magnetic recording media for longitudinal recording Hiroyuki Suzuki, Yoshihiro Shiroishi, Sadao Hishiyama, Tomoyuki Ohno, Kazuetsu Yoshida +4 more 1988-12-20
4297021 Powder material transportation apparatus Tatsuo Tani, Yasumori Nagahara, Minoru Suzuki, Kiyozo Hashizume 1981-10-27
4281557 Means for driving a movable body Tatsuo Tani 1981-08-04