Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4548565 | Extrusion machine | — | 1985-10-22 |
| 4383810 | Forming concrete support chairs | Norman W. Bunn | 1983-05-17 |
| 4280800 | Concrete slab surface finishing apparatus | — | 1981-07-28 |
| 4273522 | Reinforcing member support in concrete extruders | Norman W. Bunn | 1981-06-16 |