Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7293391 | Unitary insulated glass unit with vapor barrier | James C. Guhl, Steven M. Johnson | 2007-11-13 |
| 6889480 | Unitary insulated glass unit and method of manufacture | James C. Guhl, Steven M. Johnson | 2005-05-10 |
| 6463706 | Unitary insulated glass unit and method of manufacture | James C. Guhl, Steven M. Johnson | 2002-10-15 |