Issued Patents All Time
Showing 1–11 of 11 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6457237 | Method of kerfing insulation boards to form duct liners | Kent R. Matthews | 2002-10-01 |
| 6148867 | Duct liners | Kent R. Matthews | 2000-11-21 |
| 5953818 | Method of kerfing insulation boards and duct liners and the like formed from said boards | Kent R. Matthews | 1999-09-21 |
| 5855154 | Method of forming large diameter duct with liner and the product formed thereby | Robert R. Coleman, Kent R. Matthews | 1999-01-05 |
| 5762109 | Duct with replaceable insulating duct liners and method of maintaining the same | Kent R. Matthews | 1998-06-09 |
| 5697282 | Apparatus for and method of forming large diameter duct with liner and the product formed thereby | Robert R. Coleman, Kent R. Matthews | 1997-12-16 |
| 5567504 | Glass fiber duct board with coated grooves and the method of making the same | Robert R. Coleman, Kent R. Matthews, Lowell K. Morton | 1996-10-22 |
| 5549753 | Apparatus for coating a molded fibrous workpiece | Kent R. Matthews, Lowell K. Morton, James Young | 1996-08-27 |
| 5514417 | Method of and apparatus for coating a molded fibrous workpiece | Kent R. Matthews, Lowell K. Morton, James Young | 1996-05-07 |
| 5487412 | Glass fiber airduct with coated interior surface containing a biocide | Kent R. Matthews, Ricardo Gamboa | 1996-01-30 |
| 5379806 | Fiber glass air duct with coated interior surface containing an organic biocide | Kent R. Matthews, Ricardo Gamboa | 1995-01-10 |