Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9970471 | Direct tension indicator plate and assembly | Robert E. Stewart | 2018-05-15 |
| 9239071 | Direct tension indicator plate and assembly | Robert E. Stewart | 2016-01-19 |
| 7658579 | Nut and retainer fastener assembly | Robert E. Stewart | 2010-02-09 |