Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4824610 | Colorants for ball-point pen and ribbon inks | Louis R. de Alvare, Floyd G. Spence | 1989-04-25 |
RS
Reinhard Sappok
Overall (1989): #66,715 of 140,708Top 50%
1
Patents 1989