Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8136324 | Snap-fit pultrusion for housing elements | Raymond Browning | 2012-03-20 |
| 5795424 | High shear strength pultrusion | David W. Johnson, George Korzeniowski | 1998-08-18 |
| 5617692 | Composite structure | David W. Johnson, George Korzeniowski | 1997-04-08 |
| 5319901 | Bifurcated column joint system for electrical transmission tower | David W. Johnson, George Korzeniowski | 1994-06-14 |
| 5285613 | Pultruded joint system and tower structure made therewith | David W. Johnson | 1994-02-15 |