| # | Industry | |
|---|---|---|
| #1 | Materials and metallurgy | |
| #2 | Machines | |
| #3 | Civil engineering |
| # | Technology | |
|---|---|---|
| #1 | Building materials | |
| #2 | Shaping clay | |
| #3 | Structural elements |
| # | Name | Total Patents |
|---|---|---|
| #1 | Hof J | 4 |
| #2 | Hof Jakob | 2 |
| #3 | Hof Jacob | 1 |
| Publication | Filing date | Title |
|---|---|---|
| YU67678A | Process for producing a construction unit from a porous material | |
| IE780430L | Building unit | |
| DE2808423A1 | PROCESS FOR MANUFACTURING A BUILDING COMPOSED OF A BLOWED OPEN-PORED MINERAL AND AT LEAST ONE WATER-BINDING AGENT |