Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4885597 | Non-impact printer apparatus with improved current mirror driver and method of printing | Pin S. Tschang, Hieu T. Pham | 1989-12-05 |
| 4831395 | Printer apparatus | Hieu T. Pham, Yee S. Ng, Pin S. Tschang, Eric K. Zeise | 1989-05-16 |