Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7806228 | Single duct silencing terminal unit | Alfred Theodor Dyck, Duane McLennan, James W. Patterson, Bogna Gryc | 2010-10-05 |
| 7806229 | Fan powered silencing terminal unit | Alfred Theodor Dyck, Duane McLennan, James W. Patterson, Bogna Gryc | 2010-10-05 |