| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Canada | 5 | |
| #2 | Switzerland | 4 | |
| #3 | Austria | 3 | |
| #4 | Denmark | 3 | |
| #5 | Spain | 3 |
| # | Industry | |
|---|---|---|
| #1 | Machines |
| # | Technology | |
|---|---|---|
| #1 | Producing goods from plastic | |
| #2 | Fillers | |
| #3 | Shaping of plastics |
| # | Name | Total Patents |
|---|---|---|
| #1 | Wilhelmi Dirk Frans | 11 |
| #2 | Dirk Frans Wilhelmi | 4 |
| Publication | Filing date | Title |
|---|---|---|
| ES117062A1 | A process for manufacturing vulcanized footwear. | |
| CA294470A | Method of preparing cotton-fibre-stuff of rubber-tissue | |
| CA219948A | Vulcanizing mould for boots and shoes | |
| CA221385A | Vulcanizing the protective cover of a tire | |
| CA311463A | Method of manufacturing footwear | |
| CA277986A | Vulcanisation mould |