Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4869766 | Method for manufacturing large diameter plastic pipe | William R. Laney, Donald H. Shell | 1989-09-26 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4869766 | Method for manufacturing large diameter plastic pipe | William R. Laney, Donald H. Shell | 1989-09-26 |