Issued Patents 1994
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5368415 | Spiral flights for improved soil mixing and efficient boring for use on multi-shaft auger soil mixing apparatus | David Yang | 1994-11-29 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5368415 | Spiral flights for improved soil mixing and efficient boring for use on multi-shaft auger soil mixing apparatus | David Yang | 1994-11-29 |