Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D282707 | Portable insulated chest | Charles Gretz | 1986-02-25 |
| 4541540 | Thermally insulated chest | Charles Gretz | 1985-09-17 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D282707 | Portable insulated chest | Charles Gretz | 1986-02-25 |
| 4541540 | Thermally insulated chest | Charles Gretz | 1985-09-17 |