Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4814636 | Full pixel pulse stretching for phase reversal scophony transmission | — | 1989-03-21 |
| 4805974 | Polycone.TM. scanning system with multiple beams | Harry P. Brueggemann | 1989-02-21 |
| 4803425 | Multi-phase printed circuit board tachometer | — | 1989-02-07 |