| # | Industry | |
|---|---|---|
| #1 | Machines | |
| #2 | Consumer goods | |
| #3 | Machine tools |
| # | Technology | |
|---|---|---|
| #1 | Buttons, pins and buckles | |
| #2 | Producing goods from plastic | |
| #3 | Punching metal | |
| #4 | Unspecified technologies | |
| #5 | Certain plastics | |
| #6 | Shaping of plastics |
| # | Name | Total Patents |
|---|---|---|
| #1 | Heilmann Walter Erich | 12 |
| #2 | Wilcken Hugo Dr | 5 |
| #3 | Hugo Wilcken | 4 |
| #4 | Porepp Hans | 1 |
| Publication | Filing date | Title |
|---|---|---|
| ES263948A1 | Improvements in the zip closures hidden of spiral springs (Machine-translation by Google Translate, not legally binding) | |
| ES254160A1 | Improvements in spiral spring zippings made from threads of artificial substance, with traced coupling elements and machine for its manufacture (Machine-translation by Google Translate, not legally binding) | |
| ES247868A1 | Improvements in zip closures of elastic spirals made of artificial material and device for its manufacture (Machine-translation by Google Translate, not legally binding) |