Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4843498 | Dictating machine arranged like a telephone handset | — | 1989-06-27 |
HT
Helmut Graf von Zedlitz und Trutzschler
Overall (1989): #34,237 of 140,708Top 25%
1
Patents 1989