Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4382075 | Stabilized Romanowsky stain solution | John L. Ponzo, Ellen M. Jenning | 1983-05-03 |
| 4363632 | Stabilized solution producing a Romanowsky effect | Elizabeth Custard, John L. Ponzo | 1982-12-14 |
| 4290769 | Stabilized Romanowsky stain solution | Chittaranjan P. Patel, John L. Ponzo | 1981-09-22 |