Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4781579 | Process for changing the color of partial areas of the surface of pigmented hydraulically bonded construction elements | — | 1988-11-01 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4781579 | Process for changing the color of partial areas of the surface of pigmented hydraulically bonded construction elements | — | 1988-11-01 |