Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5302119 | Hot cement clinker cooler pocket grate | Ronald W. T. Birchard | 1994-04-12 |
| 4990124 | Tuff-face drag chain link | Ronald W. T. Birchard | 1991-02-05 |
| 4886485 | Taper-loc drag link and pin | — | 1989-12-12 |