Issued Patents All Time
Showing 1–12 of 12 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6925736 | In situ mixing apparatus and methods for creating underground wall | — | 2005-08-09 |
| 6470607 | Excavating method for constructing underground walls | — | 2002-10-29 |
| 5645376 | Soil solidification apparatus with a shear blade of adjustable length and rotation speed for creating a ribbed soil-cement pile | — | 1997-07-08 |
| 5423637 | Liner joining system and method | — | 1995-06-13 |
| 5411353 | Soil solidification apparatus with a shear blade of adjustable length and rotation speed for creating a ribbed soil-cement pile | — | 1995-05-02 |
| 5295767 | Stabilizer for an in situ column drilling apparatus | — | 1994-03-22 |
| 5246312 | System and method for producing a composite cutoff wall | — | 1993-09-21 |
| 5118223 | Multi-shaft auger apparatus and process for forming soilcrete columns and walls and grids in situ in soil | — | 1992-06-02 |
| 5013185 | Multi-shaft auger apparatus and process for fixation of soils containing toxic wastes | — | 1991-05-07 |
| 4909675 | In situ reinforced structural diaphragm walls and methods of manufacturing | — | 1990-03-20 |
| 4906142 | Side cutting blades for multi-shaft auger system and improved soil mixing wall formation process | Shigeru Takeshima | 1990-03-06 |
| 4886400 | Side cutting blades for multi-shaft auger system and improved soil mixing wall formation process | Shigeru Takeshima | 1989-12-12 |