Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5621531 | Self-aligning sewer pipe laser | Richard J. Van Andel, Gregory J. Nagel | 1997-04-15 |
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5621531 | Self-aligning sewer pipe laser | Richard J. Van Andel, Gregory J. Nagel | 1997-04-15 |