| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Australia | 3 | |
| #2 | United States | 3 | |
| #3 | WIPO (World Intellectual Property Organization) | 3 | |
| #4 | Canada | 1 | |
| #5 | EPO (European Patent Office) | 1 |
| # | Industry | |
|---|---|---|
| #1 | Engines, pumps and turbines | |
| #2 | Machines | |
| #3 | Chemical engineering | |
| #4 | Environmental technology |
| # | Name | Total Patents |
|---|---|---|
| #1 | Walker Robert A | 6 |
| #2 | Walker Robert A Jr | 2 |
| #3 | Walker Jr Robert A | 2 |
| #4 | Delillo Michael J | 1 |
| Publication | Filing date | Title |
|---|---|---|
| US2009025347A1 | Multi-throat air filter | |
| WO0238248A1 | Serviceable air-filter/oil separator assembly | |
| US6422224B1 | Remote air-oil separator | |
| US5347973A | Vacuum relief valve |