Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4668129 | Retaining wall system using soil arching | John W. Babcock, John D. Nelson | 1987-05-26 |
| 4655646 | Multitiered, rigid tieback, essentially vertical retaining wall system | John W. Babcock | 1987-04-07 |