Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5083501 | Ventilation window unit | Grenville K. Yuill, Daniel E. Friesen | 1992-01-28 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5083501 | Ventilation window unit | Grenville K. Yuill, Daniel E. Friesen | 1992-01-28 |