Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7491950 | Method for retrofitting concrete structures | Kenneth Joe Breyer, Bradley Johnson, George Edward Johnston, Martin E. Johnson, Elwood Smietana +2 more | 2009-02-17 |
| 7180080 | Method for retrofitting concrete structures | Kenneth Joe Breyer, Bradley Johnson, George Edward Johnston, Martin E. Johnson, Elwood Smietana +2 more | 2007-02-20 |
| 4836716 | Method and apparatus for piled foundation improvement through freezing using surface mounted refrigeration units | August V. Spalding, Mahmoud H. Sabet, Martin H. Luk | 1989-06-06 |
| 4784528 | Method and apparatus for piled foundation improvement with freezing using down-hole refrigeration units | August V. Spalding, Richard C. Lundberg, Mahmoud H. Sabet, Gerald F. Borrmann | 1988-11-15 |
| 4723876 | Method and apparatus for piled foundation improvement with freezing using down-hole refrigeration units | August V. Spalding, Richard C. Lundberg, Mahmoud H. Sabet, Gerald F. Borrmann | 1988-02-09 |