VL

Vurnen J. Leonard

3M: 6 patents #2,536 of 11,543Top 25%
SO Sony: 3 patents #10,744 of 25,231Top 45%
Overall (All Time): #893,928 of 4,157,543Top 25%
6
Patents All Time

Issued Patents All Time

Showing 1–6 of 6 patents

Patent #TitleCo-InventorsDate
D307893 Magnetic recording disk cartridge Arthur K. Kato, Osamu Sakurai, Osamu Koizumi 1990-05-15
4885652 Disk cartridge Masayuki Kuroda 1989-12-05
4879621 Disk restraint Davis W. Chamberlin, Osamu Koizumi 1989-11-07
4875128 Disc cartridge Arthur K. Kato, Kiyoshi Ohmori, Keisuke Fujiwara, Yutaka Soda 1989-10-17
4843512 Recording disk centering hub Larry Dean Moore, David M. Perry 1989-06-27
4631609 Stretched surface recording disk substrate Leif O. Erickson 1986-12-23