Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8062142 | Collaborative play toy | John Underbrink, Brian D. Lovgren | 2011-11-22 |
| 5816167 | Playground carriage | Daniel T. York, Russell L. Keeler, John Underbrink | 1998-10-06 |
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8062142 | Collaborative play toy | John Underbrink, Brian D. Lovgren | 2011-11-22 |
| 5816167 | Playground carriage | Daniel T. York, Russell L. Keeler, John Underbrink | 1998-10-06 |