Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4855153 | Prolonging the shelf life of fresh root vegetables | John O. Spingler, Seymour G. Gilbert | 1989-08-08 |
| 4808420 | Fresh root vegetables with prolonged shelf life | John O. Springler, Seymour G. Gilbert | 1989-02-28 |