| Number | Name | Date | Kind |
|---|---|---|---|
| 4177497 | McCook et al. | Dec 1979 | |
| 4647728 | Retallack et al. | Mar 1987 |
| Entry |
|---|
| Computer Design--Aug. 1981, p. 208h, (Printer Controller, bottom right of page). |
| QMS--Quality Micro Systems--Nov. 1983, p. 1, (Wedge Box Printer Interface Controller). |