Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5238818 | Oxidizable color producing reagent | Haruhiko Sugiyama, Mutsuhiro Date | 1993-08-24 |
| 5164512 | Oxidizable color producing reagent | Haruhiko Sugiyama | 1992-11-17 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5238818 | Oxidizable color producing reagent | Haruhiko Sugiyama, Mutsuhiro Date | 1993-08-24 |
| 5164512 | Oxidizable color producing reagent | Haruhiko Sugiyama | 1992-11-17 |