| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 3 | |
| #2 | Australia | 2 | |
| #3 | EPO (European Patent Office) | 2 | |
| #4 | WIPO (World Intellectual Property Organization) | 2 | |
| #5 | Canada | 1 | |
| #6 | Denmark | 1 |
| # | Industry | |
|---|---|---|
| #1 | Civil engineering |
| # | Technology | |
|---|---|---|
| #1 | Foundations and excavations | |
| #2 | Machines for making railways |
| # | Name | Total Patents |
|---|---|---|
| #1 | Babcock John W | 11 |
| #2 | Wormus Ronald K | 6 |
| #3 | Benson Cade L | 5 |
| #4 | Nelson John D | 5 |
| Publication | Filing date | Title |
|---|---|---|
| US4655646A | Multitiered, rigid tieback, essentially vertical retaining wall system | |
| US4668129A | Retaining wall system using soil arching | |
| US4572711A | Prestressed component retaining wall system |