| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 8 | |
| #2 | Canada | 2 | |
| #3 | EPO (European Patent Office) | 1 |
| # | Industry | |
|---|---|---|
| #1 | Chemical engineering | |
| #2 | Machines | |
| #3 | Thermal processes |
| # | Technology | |
|---|---|---|
| #1 | Separation | |
| #2 | Unspecified technologies | |
| #3 | Heat-exchanger without contact |
| # | Name | Total Patents |
|---|---|---|
| #1 | Johnson Willard L | 11 |
| Publication | Filing date | Title |
|---|---|---|
| US4966718A | Cross flow filter method | |
| US4964987A | Cross flow filter apparatus | |
| US4919805A | Vertical leaf filter flush | |
| US4859332A | Filter leaf cleaning jet apparatus | |
| US4790935A | Filter leaf assembly with bonded spacer and sealer | |
| US4579656A | Leaf-type filter | |
| CA1234357A | Filter machine | |
| US4519903A | Filter machine | |
| US4176709A | Stack-type heat exchanger |