| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Australia | 1 | |
| #2 | Bulgaria | 1 | |
| #3 | Brazil | 1 | |
| #4 | Denmark | 1 | |
| #5 | EPO (European Patent Office) | 1 | |
| #6 | Spain | 1 | |
| #7 | Israel | 1 | |
| #8 | India | 1 | |
| #9 | Mexico | 1 | |
| #10 | Netherlands | 1 | |
| #11 | New Zealand | 1 | |
| #12 | Poland | 1 | |
| #13 | Romania | 1 | |
| #14 | Turkey | 1 | |
| #15 | Yugoslavia (Serbia and Montenegro) | 1 | |
| #16 | South Africa | 1 |
| # | Industry | |
|---|---|---|
| #1 | Macromolecular chemistry and polymers | |
| #2 | Textiles and paper | |
| #3 | Machines |
| # | Technology | |
|---|---|---|
| #1 | Fiber treatments | |
| #2 | Unspecified technologies | |
| #3 | Rubber treatments |
| # | Name | Total Patents |
|---|---|---|
| #1 | Spek Dirk Pieter | 6 |
| #2 | Heyden Leonardus Antonius Van | 4 |
| #3 | Van Der Heyden Leonardus A | 2 |
| #4 | Spek Dirk P | 2 |
| #5 | Spek D P | 2 |
| #6 | Der Heyden L A Van | 1 |
| #7 | Van Der Heyden L A | 1 |
| #8 | Van Der Heyden Leonardus Anton | 1 |
| #9 | Spek Oihk Pieter | 1 |
| #10 | Heyden Leonardus Antomius Van | 1 |
| Publication | Filing date | Title |
|---|---|---|
| NL8401784A | Method for manufacturing a coagule |