Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4989384 | Insulated window assembly with internal muntin bars | James J. Kinghorn | 1991-02-05 |
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4989384 | Insulated window assembly with internal muntin bars | James J. Kinghorn | 1991-02-05 |