Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5189438 | Dual reservoir and valve system for an ink jet head | Nathan P. Hine, Paul A. Hoisington, Charles W. Spehrley, Jr, Melvin L. Biggs | 1993-02-23 |
| 4937598 | Ink supply system for an ink jet head | Nathan P. Hine, Paul A. Hoisington, Charles W. Spehrley, Jr., Melvin L. Biggs | 1990-06-26 |