| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Spain | 9 | |
| #2 | Denmark | 6 | |
| #3 | Switzerland | 5 | |
| #4 | Austria | 4 | |
| #5 | Canada | 2 | |
| #6 | United Kingdom | 1 | |
| #7 | United States | 1 |
| # | Industry | |
|---|---|---|
| #1 | Basic materials chemistry | |
| #2 | Chemical engineering | |
| #3 | Machines |
| # | Technology | |
|---|---|---|
| #1 | Milling | |
| #2 | Separation | |
| #3 | Gas, coke and tar production |
| # | Name | Total Patents |
|---|---|---|
| #1 | Trent Walter Edwin | 14 |
| #2 | Walter Edwin Trent | 5 |
| Publication | Filing date | Title |
|---|---|---|
| US1706420A | Process for distilling solid carbonaceous materrials. | |
| GB191410250A | Improvements in or relating to Filtering Apparatus. | |
| CA162962A | Separator | |
| CA236868A | Fuel composition |