Issued Patents All Time
Showing 1–9 of 9 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7785654 | Method of producing cosmetics-impregnated sheet | Yoshiyuki Nabata, Takeshi Nakajima, Masayasu Sato, Takashi Kawai, Mitsuo Shimizu | 2010-08-31 |
| 6063489 | Magnetic recording medium comprising a mixed magnetic region having a thickness relative to the total thickness of magnetic layers | Hideyuki Kobayashi, Kazutaka Yamashita, Akira Ishikawa | 2000-05-16 |
| 5814394 | Magnetic recording medium | Akira Ishikawa, Kazutaka Yamashita | 1998-09-29 |
| 5795642 | Magnetic recording medium | Akira Ishikawa, Kazutaka Yamashita | 1998-08-18 |
| 5792570 | Magnetic recording medium | Akira Ishikawa, Kazutaka Yamashita | 1998-08-11 |
| 5789063 | Magnetic recording medium | Akira Ishikawa, Kazutaka Yamashita | 1998-08-04 |
| 5718978 | Magnetic recording medium having a magnetic layer which includes magnetic particles, polurethane resin, vinyl chloride copolymer, and an amine compound | Kazutaka Yamashita, Akira Ishikawa | 1998-02-17 |
| 5705268 | Magnetic recording medium with magnetic powder in lower magnetic layer having protective image diameters | Akira Ishikawa, Kazutaka Yamashita | 1998-01-06 |
| 5629075 | Magnetic recording medium having a substrate containing magnetic powder | Akira Ishikawa, Kazutaka Yamashita | 1997-05-13 |