Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4800043 | Colorants for ball point pen and ribbon inks derived from pararosaniline process residue | Robert J. Allen, Floyd G. Spence | 1989-01-24 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4800043 | Colorants for ball point pen and ribbon inks derived from pararosaniline process residue | Robert J. Allen, Floyd G. Spence | 1989-01-24 |