The Croats presented 31 inventions at the 54th annual event, of which half were finished commercial products already on the Croatian market.
Eureka featured 450 exhibitors from 24 countries who showcased about 500 inventions.
The Association said Croatia and Belgium shared fourth place in terms of number of inventions and size of the exhibition area.
The Belgian Inventors Chamber and the Brussels mayor awarded invention knight titles to Croatian Economy, Labour and Entrepreneurship Minister Branko Vukelic, the secretary general of the Croatian Technical Culture Community, Marija Dujmovic, and inventor Ivan Vican. Twenty-five Croats hold this title.
Croatia is attending Eureka since 1991.