Diederik Hol (1970-) MSc Design Engineering is the Dutch designer/inventor of Dual Box inline skate frame and Narrow Shape Cross-Section (NSX) ice blade. A graduate from Delft University of Technology in the Netherlands, Diederik Hol was pivotal in the design evolution of the modern clapskate and is the designer of the Dual Box inline skate frame and NSX ice blade – patented technologies released under the Mogema brand that have revolutionised inline and ice speed skates. Wikipedia
The definitive Wikipedia entry for Diederik Hol. Wikipedia is the biggest multilingual free-content encyclopedia on the Internet. en.wikipedia.org/wiki/Diederik_Hol