| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 18 | |
| #2 | Canada | 2 |
| # | Industry | |
|---|---|---|
| #1 | Chemical engineering | |
| #2 | Machines | |
| #3 | Consumer goods | |
| #4 | Civil engineering | |
| #5 | Packaging and shipping | |
| #6 | Mechanical elements |
| # | Technology | |
|---|---|---|
| #1 | Separating solids using liquids | |
| #2 | Milling | |
| #3 | Unspecified technologies | |
| #4 | Tobacco | |
| #5 | Dredging | |
| #6 | Packaging | |
| #7 | Separating solids | |
| #8 | Gearing |
| # | Name | Total Patents |
|---|---|---|
| #1 | Michaelsen Charles O | 20 |
| Publication | Filing date | Title |
|---|---|---|
| US1126819A | Ore classifier and concentrator. | |
| US1140700A | Rotary classifier. | |
| US1063889A | Rock-crusher. | |
| US1126818A | Mineral-concentrator. | |
| US1158259A | Ore-grinding machine. | |
| US1090326A | Ore-classifier. | |
| US1085751A | Interrupted-drive gearing. | |
| US1040251A | Ore-screen. | |
| US1027349A | Mineral-concentrator. | |
| US994023A | Ore-crusher. | |
| CA117688A | Mineral concentrator | |
| US931210A | Ore-crusher. | |
| CA113991A | Ore crusher | |
| US917337A | Mineral-concentrator. | |
| US908592A | Ore-crusher. | |
| US887003A | Ore-crusher. | |
| US880808A | Mineral-concentrator. | |
| US849553A | Machine for separating gold and platinum from other material. | |
| US791200A | Concentrator. | |
| US785819A | Machine for separating gold from sand, &c. |