Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4807209 | Record carrier body with a follow-on track and apparatus for recording information thereon | Jan Peter Roos | 1989-02-21 |
PK
Pieter Jacob Kramer
Overall (1989): #68,497 of 140,708Top 50%
1
Patents 1989