Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4884234 | Dynamic RAM refresh circuit with DMA access | David A. Rieker | 1989-11-28 |
| 4797932 | Speaker volume control apparatus and method | John J. Rohulich | 1989-01-10 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4884234 | Dynamic RAM refresh circuit with DMA access | David A. Rieker | 1989-11-28 |
| 4797932 | Speaker volume control apparatus and method | John J. Rohulich | 1989-01-10 |