Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6182062 | Knowledge based information retrieval system | Hiromichi Fujisawa, David Cohn, Atsushi Hatakeyama | 2001-01-30 |
| 5696916 | Information storage and retrieval system and display method therefor | Naoko Yamazaki, Hiromichi Fujisawa, Tetsuya Hashimoto | 1997-12-09 |
| 5644740 | Method and apparatus for displaying items of information organized in a hierarchical structure | — | 1997-07-01 |
| 5555408 | Knowledge based information retrieval system | Hiromichi Fujisawa, David Cohn, Atsushi Hatakeyama | 1996-09-10 |
| 5553226 | System for displaying concept networks | Hiromichi Fujisawa, Atsushi Hatakeyama, Minoru Wakabayashi | 1996-09-03 |
| 5404506 | Knowledge based information retrieval system | Hiromichi Fujisawa, David Cohn, Atsushi Hatakeyama | 1995-04-04 |