Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4814669 | Method of determining the position of an electron beam in a shadow mask display tube | Erwin O. F. Siefken | 1989-03-21 |
JH
Jochem Herrmann
Overall (1989): #94,992 of 140,708Top 70%
1
Patents 1989