Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4621709 | Sound attenuating partitions and acoustical doors | — | 1986-11-11 |
| 4203255 | Fire-resistant composite wood structure particularly adapted for use in fire doors | Ian MacDonald | 1980-05-20 |