Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4355905 | Adjustable plug seal mechanism for heat transfer zone separation in hollow screws for extrusion machines | Walter A. Trumbull | 1982-10-26 |
| 4234447 | Mixing method and container therefor | Robert A. Hay, II | 1980-11-18 |