Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4838732 | Elastomeric sealing device | Stephen E. Clark | 1989-06-13 |
| 4808698 | Production of aromatic sulfide/sulfone polymers | Rex L. Bobsein | 1989-02-28 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4838732 | Elastomeric sealing device | Stephen E. Clark | 1989-06-13 |
| 4808698 | Production of aromatic sulfide/sulfone polymers | Rex L. Bobsein | 1989-02-28 |