| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Germany | 10 | |
| #2 | Netherlands | 6 | |
| #3 | France | 4 | |
| #4 | Belgium | 2 |
| # | Industry | |
|---|---|---|
| #1 | Civil engineering | |
| #2 | Furniture and games | |
| #3 | Mechanical elements | |
| #4 | Transport |
| # | Technology | |
|---|---|---|
| #1 | Swimming pools | |
| #2 | Physical training equipment | |
| #3 | Pipes | |
| #4 | Ships | |
| #5 | Devices for public amusement |
| # | Name | Total Patents |
|---|---|---|
| #1 | Heijboer Mattheus Adriaan | 5 |
| #2 | Wildeman Dirk | 1 |
| #3 | Nijenhuis Hendrik Jan | 1 |
| #4 | Nijenhuis H J | 1 |
| #5 | Jan Dr Nijenhuis Hendrik | 1 |
| Publication | Filing date | Title |
|---|---|---|
| NL7902897A | Extendable stand. | |
| NL7902896A | MOBILE SPRING SUPPORT FOR A movable CONSTRUCTION. | |
| NL7902898A | Extendable stand. | |
| NL7902899A | Extendable stand. | |
| NL7811140A | Gear, especially sports gear. | |
| NL7808741A | Extendable stand. | |
| DE2234942A1 | BASKETBALL DEVICE | |
| DE1578619A1 | Gymnastics and play equipment |