Issued Patents All Time
Showing 26–34 of 34 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6575228 | Ventilating dehumidifying system | Ron S. Ragland, Leisha J. Rotering, Russell A. Straate | 2003-06-10 |
| 6493907 | Wire terminal fastener and method | Ron Engstrom, John Philip Franey, Dan Lochner, Jeff Louwagle, Kevin Mangle +3 more | 2002-12-17 |
| 6355091 | Ventilating dehumidifying system using a wheel for both heat recovery and dehumidification | Steven M. Felber, Timothy J. Smith | 2002-03-12 |
| 6328095 | Heat recovery ventilator with make-up air capability | Steven M. Felber, Timothy J. Kensok, Ron S. Ragland, Leisha J. Rotering, Timothy J. Smith +1 more | 2001-12-11 |
| 6283851 | Make up air equipment control | Timothy J. Smith, Timothy J. Kensok | 2001-09-04 |
| 6126708 | Air plenum filter sealing system | Joseph A. Mack, Wallace Ronald Saldin, Edward L. Schwarz | 2000-10-03 |
| 5944860 | Air plenum filter adapter component | Joseph A. Mack, Wallace Ronald Saldin, Edward L. Schwarz | 1999-08-31 |
| D405519 | Filter element frame member | Richard Osendorf, Wallace Ronald Saldin, Eugene J. Takach | 1999-02-09 |
| 5840094 | Air filter element; assembly; and, method | Richard Osendorf, Wallace Ronald Saldin, Eugene J. Takach, Timothy J. Smith | 1998-11-24 |