| # | Industry | |
|---|---|---|
| #1 | Civil engineering | |
| #2 | Machines | |
| #3 | Machine tools |
| # | Name | Total Patents |
|---|---|---|
| #1 | Horn Alfred | 20 |
| #2 | Alfred Horn | 10 |
| #3 | Steckhan Kurt Ing Grad | 1 |
| #4 | Steckhan Kurt | 1 |
| Publication | Filing date | Title |
|---|---|---|
| DE2816905A1 | Demountable noise screening boundary wall using tubular components - includes sound-absorbing plugs partly or wholly closing tube ends | |
| DE2646876A1 | Double slab hollow concrete building block - has holes through lattice cross-arms for impregnating central passageways with e.g. bitumen | |
| DE2646875A1 | WALL FOR BORDERING LANDS OR STREETS | |
| CY256A | Improvements in and relating to concrete drainpipes | |
| DE1409742A1 | Concrete sewer pipe |