Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4802318 | Insulating block unit, a method for its manufacture, and a method of erecting a wall by means of such blocks | — | 1989-02-07 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4802318 | Insulating block unit, a method for its manufacture, and a method of erecting a wall by means of such blocks | — | 1989-02-07 |