Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4211302 | Sound absorbing device | Carl V. Matthews, Sr. | 1980-07-08 |
| 4211303 | Sound absorbing device | Carl V. Matthews, Sr. | 1980-07-08 |
| 4211304 | Sound absorbing device | Carl V. Matthews, Sr. | 1980-07-08 |
| 4211305 | Sound absorbing device | Carl V. Matthews, Sr. | 1980-07-08 |