| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Netherlands | 4 | |
| #2 | Australia | 2 | |
| #3 | Canada | 2 | |
| #4 | Germany | 2 | |
| #5 | United States | 2 | |
| #6 | Austria | 1 | |
| #7 | Brazil | 1 | |
| #8 | German Democratic Republic | 1 | |
| #9 | Denmark | 1 | |
| #10 | EPO (European Patent Office) | 1 | |
| #11 | France | 1 | |
| #12 | United Kingdom | 1 | |
| #13 | India | 1 | |
| #14 | Italy | 1 | |
| #15 | New Zealand | 1 | |
| #16 | Sweden | 1 |
| # | Industry | |
|---|---|---|
| #1 | Mechanical elements | |
| #2 | Packaging and shipping | |
| #3 | Machines | |
| #4 | Basic materials chemistry | |
| #5 | Engines, pumps and turbines |
| # | Name | Total Patents |
|---|---|---|
| #1 | Graaf Meine Hendricus Van Der | 4 |
| #2 | Van Der Graaf Meine Hendricus | 2 |
| #3 | Koning Wiebe | 2 |
| #4 | Van Der Graaf Meine H | 2 |
| #5 | Van Der Graaf M H | 2 |
| #6 | Wiebe Koning | 1 |
| #7 | Graaf Maine Hendricus Van Der | 1 |
| #8 | Koning W | 1 |
| #9 | Graaf Meine H Van Der | 1 |
| Publication | Filing date | Title |
|---|---|---|
| NL8402697A | Attaching a cover at an end of a thin wall tube. | |
| NL8102043A | Friction coupling. | |
| NL7812622A | Centrifugal coupling filled with a filler, in particular a granulate. |