| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Switzerland | 8 | |
| #2 | Spain | 3 | |
| #3 | Austria | 2 | |
| #4 | Canada | 1 | |
| #5 | Denmark | 1 | |
| #6 | United Kingdom | 1 |
| # | Industry | |
|---|---|---|
| #1 | Machines | |
| #2 | Engines, pumps and turbines | |
| #3 | Mechanical elements |
| # | Technology | |
|---|---|---|
| #1 | Preparing clay | |
| #2 | Lubricating of machines | |
| #3 | Clutches and brakes | |
| #4 | Pistons and sealings |
| # | Name | Total Patents |
|---|---|---|
| #1 | Ruef Heinrich | 8 |
| #2 | Heinrich Ruef | 4 |
| Publication | Filing date | Title |
|---|---|---|
| GB250568A | Improved process of and apparatus for mixing concrete, mortar, chemical products and the like | |
| CA265838A | Mixing apparatus |