Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7993423 | High efficiency grease filter cartridge | Rick A. Bagwell, Darrin W. Beardslee, Andrey V. Livchak, Derek W. Schrock | 2011-08-09 |
| 7588617 | High efficiency grease filter cartridge | Rick A. Bagwell, Darrin W. Beardslee, Andrey V. Livchak, Derek W. Schrock | 2009-09-15 |
| 5312296 | False-ceiling construction and method for the flow of air in connection with a false-ceiling construction | Erkki Aalto, Teuvo Pellinen | 1994-05-17 |
| 5220910 | Device and method for ventilation | Erkki Aalto, Teuvo Pellinen | 1993-06-22 |