Issued Patents All Time
Showing 1–8 of 8 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8568852 | Artificial grass turf and infill for sports fields | Gerardus Hubertus Smit, Frederik Jan Van Der Gaag, Marinus Hendrikus Olde Weghuis, Francois Antoine Marie Op Den Buijsch, Wilhelmus Gerardus Marie Bruls +2 more | 2013-10-29 |
| 8530026 | Artificial fiber for use in an artificial grass sports field | Pieter Spaans, Paulus Ignatius Van Leur, Frederik Jan Van Der Gaag | 2013-09-10 |
| 8465813 | Artificial lawn for artificial grass sports field | Frederik Jan Van Der Gaag, Marinus Hendrikus Olde Weghuis | 2013-06-18 |
| 8283016 | Artificial grass fibre and artificial lawn thereof | Frederik Jan Van Der Gaag, Marinus Hendrikus Olde Weghuis | 2012-10-09 |
| 6962073 | Method and device for determining the values of stiffness and dampening of surfaces | Edward Hage, Wynand Witbreuk, Marinus Hendrikus Olde Weghuis | 2005-11-08 |
| 6955841 | Artificial grass lawn for sports fields | Marinus Hendrikus Olde Weghuis | 2005-10-18 |
| 6854316 | Device for measuring the static and/or dynamic friction coefficient of an artificial grass lawn for sports fields | Edward Hage, Marinus Hendrikus Olde Weghuis | 2005-02-15 |
| 6815059 | Artificial fibre as well as an artificial lawn for sports fields provided with such fibre | Marinus Hendrikus Olde Weghuis, Frederik Jan Van Der Gaag, Leonardus Jacobus Johannus Welzen, Christian Antoine Marie Jean-Pierre Widdershoven | 2004-11-09 |