Issued Patents All Time
Showing 26–50 of 85 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| RE38569 | Information record medium, apparatus for recording the same and apparatus for reproducing the same | Kaoru Yamamoto, Ryuichiro Yoshimura, Takao Sawabe, Akihiro Tozaki, Junichi Yoshio | 2004-08-24 |
| 6778761 | Information record medium, apparatus for recording the same and apparatus for reproducing the same | Tokihiro Takahashi, Hidehiro Ishii, Hiroyuki Kurashina, Takao Sawabe, Junichi Yoshio | 2004-08-17 |
| 6757483 | Information recording medium with aggregate attribute information recorded in video manager, apparatus for recording the same and apparatus for reproducing the same | Takao Sawabe, Ryuichiro Yoshimura, Junichi Yoshio, Akihiro Tozaki, Kaoru Yamamoto | 2004-06-29 |
| 6741797 | Information record medium, apparatus for recording the same and apparatus for reproducing the same | Akihiro Tozaki, Tokihiro Takahashi, Hidehiro Ishii, Junichi Yoshio, Hiroshi Nakamura +2 more | 2004-05-25 |
| 6711276 | Control method and apparatus for embedding information in data | Hiroshi Yoshiura, Isao Echizen, Takao Arai, Hiroyuki Kimura, Toshifumi Takeuchi +2 more | 2004-03-23 |
| 6707774 | Recording and reproducing system, recording apparatus and reproducing apparatus having copy protection function | Kazuo Kuroda, Toshio Suzuki, Kazumi Sugaya | 2004-03-16 |
| 6633723 | Recording and reproducing system, recording apparatus and reproducing apparatus having copy protection function | Kazuo Kuroda, Toshio Suzuki, Kazumi Sugaya | 2003-10-14 |
| 6567612 | Information record medium, apparatus for recording the same and apparatus for reproducing the same | Junichi Yoshio, Ryuichiro Yoshimura, Takao Sawabe, Kaoru Yamamoto, Akihiro Tozaki | 2003-05-20 |
| 6501903 | Information record medium, apparatus for recording the same and apparatus for reproducing the same | Ryuichiro Yoshimura, Takao Sawabe, Kaoru Yamamoto, Akihiro Tozaki, Hisayuki Nakayama +1 more | 2002-12-31 |
| 6396997 | INFORMATION RECORD MEDIUM WHEREIN NAVIGATION INFORMATION IS RECORDED, APPARATUS FOR RECORDING INFORMATION INCLUDING NAVIGATION INFORMATION AND APPARATUS FOR REPRODUCING INFORMATION ACCORDING TO NAVIGATION INFORMATION | Ryuichiro Yoshimura, Takao Sawabe, Junichi Yoshio, Akihiro Tozaki, Kaoru Yamamoto | 2002-05-28 |
| 6389152 | Method and apparatus for superposing a digital watermark and method and apparatus for detecting a digital watermark | Takeshi Nakamura, Kazumi Sugaya | 2002-05-14 |
| 6266478 | Information record medium, apparatus for recording the same and apparatus for reproducing the same | Junichi Yoshio, Ryuichiro Yoshimura, Takao Sawabe, Kaoru Yamamoto, Akihiro Tozaki | 2001-07-24 |
| 6253018 | Information record medium, apparatus for recording the same and apparatus for reproducing the same | Ryuichiro Yoshimura, Takao Sawabe, Junichi Yoshio, Akihiro Tozaki, Kaoru Yamamoto | 2001-06-26 |
| 6236804 | Information record medium, apparatus for recording the same and apparatus for reproducing the same | Akihiro Tozaki, Tokihiro Takahashi, Hidehiro Ishii, Junichi Yoshio, Hiroshi Nakamura +2 more | 2001-05-22 |
| 6215952 | Information record medium, apparatus for recording the same and apparatus for reproducing the same | Junichi Yoshio, Ryuichiro Yoshimura, Takao Sawabe, Kaoru Yamamoto, Akihiro Tozaki +1 more | 2001-04-10 |
| 6212330 | Information record medium, apparatus for recording the same and apparatus for reproducing the same | Kaoru Yamamoto, Ryuichiro Yoshimura, Takao Sawabe, Akihiro Tozaki, Junichi Yoshio | 2001-04-03 |
| 6157769 | Information record medium, apparatus for recording the same and apparatus for reproducing the same | Ryuichiro Yoshimura, Takao Sawabe, Kaoru Yamamoto, Akihiro Tozaki, Hisayuki Nakayama +1 more | 2000-12-05 |
| 6148138 | Information record medium, apparatus for recording the same and apparatus for reproducing the same | Takao Sawabe, Ryuichiro Yoshimura, Kaoru Yamamoto, Akihiro Tozaki, Junichi Yoshio | 2000-11-14 |
| 6137954 | Information record medium, apparatus for recording the same and apparatus for reproducing the same | Takao Sawabe, Ryuichiro Yoshimura, Junichi Yoshio, Akihiro Tozaki, Kaoru Yamamoto | 2000-10-24 |
| 6122434 | Information recording medium, having data and management portions, and an apparatus for reproducing information from the medium | Takao Sawabe, Ryuichiro Yoshimura, Junichi Yoshio, Akihiro Tozaki, Kaoru Yamamoto | 2000-09-19 |
| 6111990 | Digital-watermark superposing apparatus and digital-watermarker detecting apparatus | Kazumi Sugaya, Takeshi Nakamura | 2000-08-29 |
| 6108281 | Accessing control for optical recording device capable of performing time search | Akihiro Tozaki, Takao Sawabe, Ryuichiro Yoshimura, Kaoru Yamamoto, Hiroshi Nakamura +1 more | 2000-08-22 |
| 6104684 | Information recording medium, with aggregate attribute information recorded in video manager apparatus for recording the same and apparatus for reproducing the same | Takao Sawabe, Kaoru Yamamoto, Ryuichiro Yoshimura, Akihiro Tozaki, Junichi Yoshio | 2000-08-15 |
| 6091674 | Accessing control for optical recording device capable of performing time search | Akihiro Tozaki, Takao Sawabe, Ryuichiro Yoshimura, Kaoru Yamamoto, Hiroshi Nakamura +1 more | 2000-07-18 |
| 6088506 | Information record medium, apparatus for recording the same and apparatus for reproducing the same | Junichi Yoshio, Ryuichiro Yoshimura, Takao Sawabe, Kaoru Yamamoto, Akihiro Tozaki | 2000-07-11 |