Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6412132 | Methods for constructing a bridge utilizing in-situ forms supported by beams | John W. Fenton | 2002-07-02 |
| 6341456 | Long-span in-situ concrete structures and method for constructing the same | William M. Bjerke | 2002-01-29 |
| 5927346 | Concrete pipes and methods for the manufacture thereof | William M. Bjerke | 1999-07-27 |
| 5553430 | Method and apparatus for erecting building structures | William M. Bjerke | 1996-09-10 |
| 5535565 | Containment structure and method of making same | William M. Bjerke | 1996-07-16 |
| 5533221 | Method and apparatus for bridge construction | William M. Bjerke | 1996-07-09 |