Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6099076 | Chair back construction | Duane F. Nagel, Daniel P. Beemer, Dale M. Groendal, Jeffrey A. Hall | 2000-08-08 |
| 6062649 | Chair back construction | Duane F. Nagel, Daniel P. Beemer, Dale M. Groendal, Jeffrey A. Hall | 2000-05-16 |