Issued Patents All Time
Showing 26–50 of 50 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5516469 | Process for producing substrate sheet for information recording mediums | Tsuyoshi Santoh, Hiroyuki Sugata, Masataka Yashima, Hirofumi Kamitakahara, Hitoshi Yoshino +2 more | 1996-05-14 |
| 5503888 | Optical recording medium, substrate for optical recording medium, and method for preparing substrate for optical recording medium | Hirofumi Kamitakahara, Naoki Kushida, Hitoshi Yoshino, Toshiya Yuasa, Takashi Kai | 1996-04-02 |
| 5480596 | Optical recording medium substrate sheet producing apparatus having roll stamper with elastomer layer of predetermined hardness | Yukitoshi Okubo, Tsuyoshi Santoh, Miki Tamura, Chieko Mihara, Hiroyuki Sugata +1 more | 1996-01-02 |
| 5460766 | Process of making substrate for an optical recording medium | Hirofumi Kamitakahara, Yukitoshi Ohkubo, Naoki Kushida, Hitoshi Yoshino, Tetsuya Sato +1 more | 1995-10-24 |
| 5456866 | Process for manufacturing a substrate sheet for information recording mediums | Hirofumi Kamitakahara, Naoki Kushida, Hitoshi Yoshino, Toshiya Yuasa, Takashi Kai +1 more | 1995-10-10 |
| 5433897 | Method and apparatus for preparing substrate sheet for optical recording medium | Hirofumi Kamitakahara, Naoki Kushida, Hitoshi Yoshino, Toshiya Yuasa, Takashi Kai | 1995-07-18 |
| 5383834 | Roll stamper for forming a base for information recording medium | Hirofumi Kamitakahara, Hitoshi Yoshino, Tetsuya Sato, Hisanori Hayashi | 1995-01-24 |
| 5368789 | Method for forming substrate sheet for optical recording medium | Hirofumi Kamitakahara, Hitoshi Yoshino, Tetsuya Sato, Hisanori Hayashi | 1994-11-29 |
| 5328816 | Process for producing optical recording medium | Miki Tamura, Hiroyuki Sugata, Yukitoshi Okubo, Mizuho Hiraoka, Masataka Yashima | 1994-07-12 |
| 5324188 | Roller stamper for molding a substrate sheet to become an information recording medium | Tsuyoshi Santoh, Hiroyuki Sugata, Masataka Yashima, Hirofumi Kamitakahara, Hitoshi Yoshino +2 more | 1994-06-28 |
| 5320514 | Roll stamper, and apparatus and process for manufacturing substrate sheet for information recording mediums by using the same | Hirofumi Kamitakahara, Naoki Kushida, Hitoshi Yoshino, Toshiya Yuasa, Takashi Kai +1 more | 1994-06-14 |
| 5320787 | Apparatus and process for manufacturing substrate sheet for information recording mediums | Hisanori Hayashi, Hirofumi Kamitakahara, Hitoshi Yoshino, Tetsuya Sato | 1994-06-14 |
| 5310333 | Roll stamper for molding substrate used for optical recording medium | Tetsuya Sato, Masataka Yashima, Hiroyuki Sugata | 1994-05-10 |
| 5308235 | Roll stamper and apparatus for forming a substrate for information recording medium | Hirofumi Kamitakahara, Yukitoshi Ohkubo, Naoki Kushida, Hitoshi Yoshino, Tetsuya Sato +1 more | 1994-05-03 |
| 5281372 | Process for producing resin moldings having a concave-convex pattern on the surface | Hisanori Hayashi, Hirofumi Kamitakahara, Naoki Kushida, Hitoshi Yoshino, Tetsuya Sato | 1994-01-25 |
| 5281371 | Method and apparatus for forming substrate sheet for optical recording medium | Miki Tamura, Tsuyoshi Santoh | 1994-01-25 |
| 5266136 | Process for producing a roll stamper for molding a substrate sheet for information recording mediums | Tsuyoshi Santoh, Hiroyuki Sugata, Masataka Yashima, Tetsuya Sato, Hitoshi Yoshino +2 more | 1993-11-30 |
| 5267228 | Substrates for optical cards, process for preparing substrates for optical cards, optical cards and apparatus for recording and reproducing information on optical cards | Masataka Yashima, Hirofumi Kamitakahara, Tsuyoshi Santoh, Hiroyuki Sugata, Tetsuya Sato +2 more | 1993-11-30 |
| 5231262 | Optical cutting method and optical cutter | Susumu Matsumura, Masataka Yashima, Tsuyoshi Santoh, Kazuya Matsumoto | 1993-07-27 |
| 5173313 | Roll-stamper for forming substrate of information-recording medium | Tetsuya Sato, Hitoshi Yoshino, Hisanori Hayashi, Hirofumi Kamitakahara | 1992-12-22 |
| 5167792 | Master holder of stamper electroforming apparatus and electroforming method | Hirofumi Kamitakahara, Naoki Kushida, Hitoshi Yoshino, Hisanori Hayashi | 1992-12-01 |
| 5147592 | Process of and apparatus for preparing optical recording medium substrates | Tetsuya Sato, Hitoshi Yoshino, Hirofumi Kamitakahara, Hisanori Hayashi, Tsuyoshi Santoh | 1992-09-15 |
| 5137661 | Process for producing optical recording medium | Hiroyuki Sugata, Tetsuya Satoh, Yukitoshi Ohkubo, Tsuyoshi Santoh | 1992-08-11 |
| 5048745 | Roll stamper for molding substrate used for optical recording medium, process for preparing same, and process for preparing optical recording medium making use of it | Tetsuya Sato, Masataka Yashima, Hiroyuki Sugata | 1991-09-17 |
| 4954380 | Optical recording medium and process for production thereof | Takayoshi Tsutsumi | 1990-09-04 |