Average Co-Inventor Count = 2.00
ph-index = 2
The patent ph-index is calculated by counting the number of publications for which an author has been cited by other authors at least that same number of times.
Company Filing History:
1. Other (2 from 832,812 patents)
2. De Vries, Hugo (0 patent)
3. Rook, Pieter (0 patent)
2 patents:
1. 9039541 - Method for laying a playable surface, for instance a playing field, and surface thus formed
2. 8133123 - Method for laying a passable surface, for instance a playing ground, and surface thus formed