| # | Country | Total Patents | |
|---|---|---|---|
| #1 | France | 5 | |
| #2 | Canada | 3 | |
| #3 | United Kingdom | 3 | |
| #4 | Germany | 1 | |
| #5 | United States | 1 |
| # | Industry | |
|---|---|---|
| #1 | Chemical engineering | |
| #2 | Basic materials chemistry | |
| #3 | Engines, pumps and turbines | |
| #4 | Mechanical elements |
| # | Technology | |
|---|---|---|
| #1 | Separation | |
| #2 | Dry-cleaning fibers | |
| #3 | Lubricating | |
| #4 | Lubricating compositions | |
| #5 | Lubricating of machines |
| # | Name | Total Patents |
|---|---|---|
| #1 | Audubert Rene | 3 |
| #2 | Rene Audubert | 1 |
| Publication | Filing date | Title |
|---|---|---|
| DE556879C | Process for removing fresh stains from oil, grease, resin and the like Like. Made of tissue or paper | |
| GB306814A | Improvements in or relating to oil filters | |
| GB301507A | Improvements in or relating to filtering devices | |
| GB299448A | Improvements in or relating to filtration processes | |
| US1810458A | Motor car filter system | |
| CA293188A | Filtration method | |
| CA301021A | Filtering device | |
| CA288114A | Filtering system |