| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 9 | |
| #2 | Canada | 2 |
| # | Industry | |
|---|---|---|
| #1 | Machines | |
| #2 | Chemical engineering | |
| #3 | Engines, pumps and turbines | |
| #4 | Thermal processes |
| # | Technology | |
|---|---|---|
| #1 | Separation | |
| #2 | Cyclones | |
| #3 | Non-positive-displacement pumps | |
| #4 | Air-conditioning | |
| #5 | Unspecified technologies | |
| #6 | Grates |
| # | Name | Total Patents |
|---|---|---|
| #1 | Bullock Ellis W | 6 |
| #2 | Coward Richard W | 2 |
| #3 | Smith Lloyd B | 2 |
| #4 | Vaughan Jr Edgar D | 1 |
| #5 | Driver William E | 1 |
| Publication | Filing date | Title |
|---|---|---|
| US3371470A | Apparatus for separating entrained materials from gases | |
| US3345806A | Bag type dust collector | |
| US3297239A | Cooling system for shafts and the like | |
| US3130024A | Apparatus for separating foreign matter from air | |
| US2728409A | Gas scrubber | |
| US2549174A | Water-cooled shaft | |
| US2415935A | Ash collector | |
| US2410266A | Grate | |
| US2348785A | Fly ash collector | |
| CA484490A | Water cooled shaft | |
| CA590301A | Centrifugal dust collector |