This product is protected by the following patents and patent applications and their corresponding national rights:
| Issuing office | Publication number |
|---|---|
| United States Patent and Trademark Office | US 5,827,438 |
| US 6,177,673 | |
| European Patent Office | EP0776023 |
| EP0922972 | |
| German Patent and Trade Mark Office | 69615635 |
| Japan Patent Office | 4263285 |
| Finnish Patent Office | 112005 |
| 105598 |