Issued Patents 2004
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6816146 | Electrophoretic display liquid and electrophoretic display medium and device using the liquid having predetermined different volume medium particle diameters | Shigeyuki Harada, Kunio Hayakawa | 2004-11-09 |
| 6747170 | Thermosensitive recording material and color developer compound therefor | Kunio Hayakawa | 2004-06-08 |
| 6710015 | Thermosensitive recording material | Yoshikazu Kaneko, Yasutomo Mori, Mitsuru Naruse, Kunio Hayakawa | 2004-03-23 |
| 6693621 | Electrophoretic display method, display medium, liquid and particle for display medium, display apparatus, and reversible display material | Kunio Hayakawa, Shigeyuki Harada | 2004-02-17 |