Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8382464 | Extruded cellulose-polymer composition and system for making same | Brian Keller, David F. Dostal, Alfred England | 2013-02-26 |
| 7186102 | Apparatus and method for low-density cellular wood plastic composites | Brian Keller, Alfred England, David F. Dostal | 2007-03-06 |
| 6344504 | Extrusion of synthetic wood material | Burch E. Zehner | 2002-02-05 |
| 5516472 | Extruded synthetic wood composition and method for making same | — | 1996-05-14 |