| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Italy | 5 | |
| #2 | Australia | 4 | |
| #3 | Canada | 3 | |
| #4 | Germany | 3 | |
| #5 | United Kingdom | 3 | |
| #6 | Sweden | 3 | |
| #7 | South Africa | 3 | |
| #8 | France | 2 | |
| #9 | Austria | 1 | |
| #10 | Belgium | 1 | |
| #11 | Spain | 1 | |
| #12 | Finland | 1 | |
| #13 | Greece | 1 | |
| #14 | Croatia | 1 | |
| #15 | Netherlands | 1 | |
| #16 | United States | 1 | |
| #17 | Yugoslavia (Serbia and Montenegro) | 1 |
| # | Industry | |
|---|---|---|
| #1 | Chemical engineering | |
| #2 | Machines |
| # | Technology | |
|---|---|---|
| #1 | Separating solids using liquids | |
| #2 | Cyclones |
| # | Name | Total Patents |
|---|---|---|
| #1 | Ruff Henry J | 24 |
| #2 | Ferrara Gianfranco | 23 |
| #3 | Ferrara G | 4 |
| #4 | Ruff H J | 4 |
| #5 | Way G E | 1 |
| #6 | Ferrara Cianfranco | 1 |
| #7 | Road F | 1 |
| #8 | Guarascio Massimo | 1 |
| #9 | Guarascio M | 1 |
| Publication | Filing date | Title |
|---|---|---|
| HRP940045B1 | Apparatus for the dynamic separation of minerals | |
| GB8522392D0 | Separating mixtures of solids of different specific gravity | |
| GB8327571D0 | Apparatus for separating mixtures of solids in particular mixtures of minerals into at least three products of different specific gravity | |
| GB2108012A | Process for the thick-medium dynamic separation of mixtures of materials | |
| AU3955278A | Separator for mining |