Issued Patents 2021
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11187431 | Variable flow adapters for air diffusers with damper | Ryan M. Perkinson, Mark J. Costello, Hajo C. M. Siemers | 2021-11-30 |
| 11022989 | Air distribution systems and methods | Jason T. Letterman, David G. Pich, Virginia M. Sivie, Hajo C. M. Siemers | 2021-06-01 |