Issued Patents All Time
Showing 1–25 of 25 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7401228 | Method for transmitting data, apparatus for recording data, medium for recording data, and apparatus for reproducing data | Yoichiro Sako, Yoshitomo Osawa, Akira Kurihara, Isao Kawashima | 2008-07-15 |
| 7398251 | Method and apparatus for transmitting and receiving a decoding key encoded with specific information to decode encrypted information of a record medium | Yoichiro Sako, Akira Kurihara, Yoshitomo Osawa, Isao Kawashima | 2008-07-08 |
| 7380132 | Data recording method and apparatus, data record medium and data reproducing method and apparatus | Yoichiro Sako, Isao Kawashima, Akira Kurihara, Yoshitomo Osawa | 2008-05-27 |
| 7366700 | Method and apparatus for transmitting and receiving a decoding key encoded with specific information to decode encrypted information of a record medium | Yoichiro Sako, Akira Kurihara, Yoshitomo Osawa, Isao Kawashima | 2008-04-29 |
| 7321878 | Method and apparatus for transmitting and receiving a decoding key encoded with specific information to decode encrypted information of a record medium | Yoichiro Sako, Akira Kurihara, Yoshitomo Osawa, Isao Kawashima | 2008-01-22 |
| 7249101 | Method and apparatus for transmitting and receiving a decoding key encoded with specific information to decode encrypted information of a record medium | Yoichiro Sako, Akira Kurihara, Yoshitomo Osawa, Isao Kawashima | 2007-07-24 |
| 7246096 | Method and apparatus for transmitting and receiving a decoding key encoded with specific information to decode encrypted information of a record medium | Yoichiro Sako, Akira Kurihara, Yoshitomo Osawa, Isao Kawashima | 2007-07-17 |
| 7246095 | Method and apparatus for transmitting and receiving a decoding key encoded with specific information to decode encrypted information of a record medium | Yoichiro Sako, Akira Kurihara, Yoshitomo Osawa, Isao Kawashima | 2007-07-17 |
| 6944297 | Method and apparatus for reproducing ciphered data | Yoichiro Sako, Isao Kawashima, Akira Kurihara, Yoshitomo Osawa | 2005-09-13 |
| 6882987 | Methods and apparatus for transmitting and receiving a decoding key encoded with specific information to decode encrypted information of a record medium | Yoichiro Sako, Akira Kurihara, Yoshitomo Osawa, Isao Kawashima | 2005-04-19 |
| 6687826 | Optical disc and method of recording data into same | — | 2004-02-03 |
| 6564009 | Apparatus for recording and/or reproducing data onto and/or from an optical disk and method thereof | Shoei Kobayashi, Susumu Sensyu, Shinji Katsuramoto, Toshio Watanabe, Hidenori Mori +2 more | 2003-05-13 |
| 6487293 | Method and apparatus for reproducing ciphered data | Yoichiro Sako, Isao Kawashima, Akira Kurihara, Yoshitomo Osawa | 2002-11-26 |
| 6463153 | Method for transmitting data apparatus for recording data medium for recording data and apparatus for reproducing data | Yoichiro Sako, Yoshitomo Osawa, Akira Kurihara, Isao Kawashima | 2002-10-08 |
| 6445795 | Data recording method and apparatus, data record medium and data reproducing method and apparatus | Yoichiro Sako, Isao Kawashima, Akira Kurihara, Yoshitomo Osawa | 2002-09-03 |
| 6320841 | Slider for optical head | Kenjiro Watanabe, Shigeo Kubota | 2001-11-20 |
| 6215745 | Decoding key recorded at a recording site in order to decode information transmitted to that site is encoded with information specific to the recording site | Yoichiro Sako, Akira Kurihara, Yoshitomo Osawa, Isao Kawashima | 2001-04-10 |
| 6134201 | Data recording apparatus, method therefor, data reproducing apparatus, method therefor and record medium | Yoichiro Sako, Akira Kurihara, Yoshitomo Osawa, Isao Kawashima | 2000-10-17 |
| 6005839 | Data transmitting method, data recording apparatus, data record medium and data reproducing apparatus | Yoichiro Sako, Yoshitomo Osawa, Akira Kurihara, Isao Kawashima, Shozo Masuda | 1999-12-21 |
| 5901127 | Data recording method and apparatus, data record medium and data reproducing method and apparatus | Yoichiro Sako, Isao Kawashima, Akira Kurihara, Yoshitomo Osawa | 1999-05-04 |
| 5802174 | Data recording medium | Yoichiro Sako, Yoshitomo Osawa, Akira Kurihara, Isao Kawashima | 1998-09-01 |
| 5587984 | Hologram printed on optical recording medium for copy protection | Seiji Kobayashi | 1996-12-24 |
| 5379119 | Video disk recording apparatus wherein the frequency of the carrier is lowered and the frequency range of the information signal is narrowed when a recording laser beam is positioned at an extended recording area of the disk | — | 1995-01-03 |
| 5323374 | Method of magneto-optical recording | Masayuki Arai | 1994-06-21 |
| 5083212 | Apparatus and method for recording a color television signal on an optical disc | Mikio Sugiki, Hitoshi Okada, Hiroo Takahashi | 1992-01-21 |