| # | Industry | |
|---|---|---|
| #1 | Chemical engineering | |
| #2 | Mechanical elements |
| # | Technology | |
|---|---|---|
| #1 | Separation | |
| #2 | Lubricating |
| # | Name | Total Patents |
|---|---|---|
| #1 | Liddell Robert Patterson Field | 5 |
| #2 | Irwine Robert Lennox | 2 |
| #3 | Williams Lewis Waldermar | 1 |
| #4 | Kovacs Julius Paul | 1 |
| #5 | Liddell Robert P F | 1 |
| Publication | Filing date | Title |
|---|---|---|
| CA336994A | Filter | |
| CA318094A | Filter | |
| CA355695A | Filter | |
| CA270562A | Lubricating system | |
| CA391670A | Filter unit forming machine | |
| CA330220A | Filtering system | |
| CA357195A | Filter | |
| CA398314A | Filter-forming machine |