| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 11 | |
| #2 | France | 3 | |
| #3 | United Kingdom | 3 |
| # | Industry | |
|---|---|---|
| #1 | Machines | |
| #2 | Chemical engineering | |
| #3 | Packaging and shipping |
| # | Technology | |
|---|---|---|
| #1 | Milling | |
| #2 | Separating solids | |
| #3 | Transport or storage devices |
| # | Name | Total Patents |
|---|---|---|
| #1 | Frank Pardee | 11 |
| #2 | Pardee Frank | 3 |
| #3 | Pardee Jr Frank | 1 |
| Publication | Filing date | Title |
|---|---|---|
| GB346026A | Coal breaker | |
| US1750941A | Coal breaker | |
| US1577072A | Feeder for breakers | |
| GB219863A | Improvements in spiral lowering chutes | |
| US1515965A | Air spiral | |
| US1560304A | Feeder for coal breakers | |
| US1480105A | Spiral lowering chute | |
| US1477848A | Coal breaker | |
| US1435330A | Coal breaker | |
| US1412793A | Coal breaker | |
| GB160669A | Improvements in or relating to spiral separators | |
| US1419407A | Coal breaker | |
| US1356465A | Coal-breaker | |
| US1356464A | Spiral separator |