Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4824610 | Colorants for ball-point pen and ribbon inks | Reinhard Sappok, Floyd G. Spence | 1989-04-25 |
LA
Louis R. de Alvare
Overall (1989): #83,180 of 140,708Top 60%
1
Patents 1989