| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Canada | 6 | |
| #2 | Switzerland | 5 | |
| #3 | Austria | 4 | |
| #4 | United Kingdom | 2 | |
| #5 | Spain | 1 |
| # | Industry | |
|---|---|---|
| #1 | Materials and metallurgy |
| # | Technology | |
|---|---|---|
| #1 | Metal production and refining |
| # | Name | Total Patents |
|---|---|---|
| #1 | Elmore Frank Edward | 12 |
| #2 | Frank Edward Elmore | 5 |
| #3 | Smith Stanley Cochran | 1 |
| #4 | Ashcroft Edgar Arthur | 1 |
| Publication | Filing date | Title |
|---|---|---|
| CA193958A | Lead extraction | |
| GB129773A | Improvements in Processes for the Extraction of Lead from its Ores. | |
| GB127641A | Improvements in Processes for the Extraction of Lead and Zinc from their Ores. | |
| CA217901A | Extraction of lead and silver from sulphide ores | |
| CA313143A | Process of reducing tin, etc. | |
| CA288133A | Lead chloride processing | |
| CA208477A | Treatment of lead zinc ores | |
| CA205829A | Extraction of lead and zinc |