Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6268410 | Colored concrete roofing tiles and a method for producing colored concrete bodies such as colored concrete roofing tiles | Andreas Drechsler, Daniel Neupert | 2001-07-31 |
| 6090329 | Method of producing colored concrete bodies such as colored concrete roofing tiles | Andreas Drechsler, Daniel Neupert | 2000-07-18 |