| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Austria | 3 | |
| #2 | Switzerland | 2 | |
| #3 | United Kingdom | 2 | |
| #4 | Canada | 1 | |
| #5 | Germany | 1 | |
| #6 | Denmark | 1 | |
| #7 | France | 1 |
| # | Industry | |
|---|---|---|
| #1 | Machines |
| # | Technology | |
|---|---|---|
| #1 | Shaping clay |
| # | Name | Total Patents |
|---|---|---|
| #1 | Ziegelpatenten Avan A-G Gesell | 1 |
| #2 | Ziegelpatenten Avan A G Gesell | 1 |
| #3 | Koidl Thomas | 1 |
| Publication | Filing date | Title |
|---|---|---|
| GB401995A | Improvements in brick-making machinery | |
| DE622053C | Device for the production of hollow stones closed on five sides from kneadable mass | |
| GB371268A | Improvements in and relating to hollow-channel bricks and means for the closing up of the open ends of the channels of such bricks | |
| CA327608A | Hollow brick or block manufacture |