| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 10 | |
| #2 | Denmark | 3 | |
| #3 | France | 3 | |
| #4 | Austria | 2 | |
| #5 | Canada | 1 | |
| #6 | Netherlands | 1 |
| # | Industry | |
|---|---|---|
| #1 | Chemical engineering | |
| #2 | Foods and drinks | |
| #3 | Machines | |
| #4 | Measurement | |
| #5 | Control | |
| #6 | Medical technology | |
| #7 | Environmental technology | |
| #8 | Mechanical elements |
| # | Name | Total Patents |
|---|---|---|
| #1 | Zahm Edward | 9 |
| #2 | Nagel Charles A | 1 |
| #3 | Walquist Frank W | 1 |
| #4 | Edward Zahm | 1 |
| Publication | Filing date | Title |
|---|---|---|
| US1328221A | Filter | |
| US1294018A | Filter. | |
| US1218154A | Method of testing filter-bodies. | |
| US1218738A | Filter. | |
| CA179152A | Method of testing filters | |
| US1203835A | Filter. | |
| US1153282A | Filter. | |
| US1108539A | Method of sterilizing bottles. | |
| US1077448A | Filtration. | |
| US1040090A | Filter. | |
| US1120002A | Pressure-regulator. |