| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Switzerland | 8 | |
| #2 | Austria | 4 | |
| #3 | Belgium | 4 | |
| #4 | Germany | 2 |
| # | Industry | |
|---|---|---|
| #1 | Civil engineering | |
| #2 | Machines |
| # | Technology | |
|---|---|---|
| #1 | Roof coverings | |
| #2 | Shaping clay |
| # | Name | Total Patents |
|---|---|---|
| #1 | Ludowici Ludwig Franz | 10 |
| #2 | Ludwig Franz Ludowici | 8 |
| Publication | Filing date | Title |
|---|---|---|
| BE576175A | Tiles to cover the edges of roofs. | |
| CH319149A | Storm clip on a tiled roof | |
| CH318723A | Interlocking tiles with several top and side rabbets | |
| CH320212A | Interlocking tiles with multiple top and side rabbets | |
| CH317796A | Ridge connection tile | |
| CH291756A | Interlocking tiles. | |
| CH301718A | Interlocking tiles. | |
| CH293954A | Interlocking tiles with several head and side ribs. | |
| DE862493C | Interlocking tiles with support ribs |