| # | Country | Total Patents | |
|---|---|---|---|
| #1 | France | 3 | |
| #2 | Netherlands | 3 | |
| #3 | Germany | 2 | |
| #4 | Spain | 2 | |
| #5 | United Kingdom | 2 | |
| #6 | Sweden | 2 | |
| #7 | Canada | 1 | |
| #8 | EPO (European Patent Office) | 1 | |
| #9 | Finland | 1 | |
| #10 | Italy | 1 | |
| #11 | Japan | 1 | |
| #12 | Norway | 1 | |
| #13 | United States | 1 |
| # | Industry | |
|---|---|---|
| #1 | Packaging and shipping | |
| #2 | Machine tools |
| # | Technology | |
|---|---|---|
| #1 | Containers for goods storage | |
| #2 | Punching metal | |
| #3 | Closing and opening bottles |
| # | Name | Total Patents |
|---|---|---|
| #1 | Wijn Jacques Adriaan De | 4 |
| #2 | De Wijn Jacques A | 2 |
| #3 | De Wijn Jacques Adriaan | 1 |
| #4 | Wijn J A De | 1 |
| #5 | De Wijn J A | 1 |
| #6 | Jiyatsuku Adorian De Uin | 1 |
| Publication | Filing date | Title |
|---|---|---|
| NL8201681A | Sealing cover for sealing a holder under vacuum (vacuum snap cap). | |
| GB1598170A | Bottle closure and method | |
| JPS5224316A | Method of closing port of container | |
| FR2232938A5 | Cover for vacuum packed food containers - central region deflects inwards to indicate satisfactory internal vacuum |