Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4252460 | Retaining wall and method of forming said wall | Carlos W. Johansen, Jitendra Khanna, Norman F. B. Allyn | 1981-02-24 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4252460 | Retaining wall and method of forming said wall | Carlos W. Johansen, Jitendra Khanna, Norman F. B. Allyn | 1981-02-24 |