Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4814717 | FSK frequency discriminator for a coherent optical transmission system | — | 1989-03-21 |
PH
Pieter W. Hooijmans
Overall (1989): #68,509 of 140,708Top 50%
1
Patents 1989