Issued Patents 2002
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6432615 | Acid-generating composition and recording material using the same | Koki Nakamura, Shun-ichi Ishikawa | 2002-08-13 |
| 6372416 | Dye-forming method, color developing compositions, photosensitive materials and color developing agent precursors | Shun-ichi Ishikawa, Hideaki Naruse, Koki Nakamura, Toshio Kawagishi, Tadashi Ohmatsu +1 more | 2002-04-16 |