Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4856267 | Method and apparatus for twisting together lengths of filamentary material | — | 1989-08-15 |
| 4857676 | Magnetically permeable particles in telecommunications cable | G. Douglas Baxter, James C. Grant | 1989-08-15 |