| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Switzerland | 6 | |
| #2 | Denmark | 4 | |
| #3 | Austria | 3 | |
| #4 | Spain | 1 | |
| #5 | United Kingdom | 1 |
| # | Industry | |
|---|---|---|
| #1 | Engines, pumps and turbines | |
| #2 | Chemical engineering | |
| #3 | Mechanical elements | |
| #4 | Civil engineering |
| # | Technology | |
|---|---|---|
| #1 | Non-positive-displacement pumps | |
| #2 | Sewers | |
| #3 | Mixing | |
| #4 | Pipe-line systems |
| # | Name | Total Patents |
|---|---|---|
| #1 | Billand Carl | 11 |
| #2 | Carl Billand | 3 |
| Publication | Filing date | Title |
|---|---|---|
| ES101300A1 | A method and device for manufacturing tubes by centrifugal casting. | |
| GB191320487A | An Improved Water Trap for Gas Mains. |