| # | Country | Total Patents | |
|---|---|---|---|
| #1 | China | 3 | |
| #2 | France | 3 | |
| #3 | WIPO (World Intellectual Property Organization) | 3 | |
| #4 | United States | 2 | |
| #5 | Canada | 1 | |
| #6 | India | 1 | |
| #7 | Republic of Korea | 1 | |
| #8 | Philippines | 1 |
| # | Industry | |
|---|---|---|
| #1 | Materials and metallurgy | |
| #2 | Environmental technology | |
| #3 | Basic materials chemistry |
| # | Name | Total Patents |
|---|---|---|
| #1 | Drinkard William F | 15 |
| #2 | Woerner Hans J | 15 |
| #3 | Nixon William M | 15 |
| Publication | Filing date | Title |
|---|---|---|
| CN104603858A | Recovering metal values from oxides of manganese-containing materials |