Issued Patents 1989
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 |
LA
Louis Rolando de Alvare
Overall (1989): #138,654 of 140,708Top 100%
1
Patents 1989