Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4839617 | Bandpass filter circuit arrangement | — | 1989-06-13 |
JS
John D. Speake
Overall (1989): #92,770 of 140,708Top 70%
1
Patents 1989