Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4864330 | Method of forming a hot melt ink unit | Linda T. Creagh, Charles W. Spehrley, Jr., Dean H. Cranston, Jack B. MacDonald | 1989-09-05 |
| 4814786 | Hot melt ink supply system | Paul A. Hoisington, Charles W. Spehrley, Jr. | 1989-03-21 |