WonderBoard is a cement-based backer board mainly used for tiling in wet places. Specifically, its components are Portland cement, expanded polystyrene (EPS) beads, aggregates, and fiberglass reinforcement.
It looks like WonderBoard is also a trademark/
Is there a way to find who holds the trademark?
The (r) symbol indicates this is a registered trademark, and as such has registered with the US Patent and Trademark Office. The USPTO maintains a public searchable database of all registered marks. A little trial and error reveals the pertinent search term here, is "Wonder Board" including the space. This mark is registered to Modulars, Inc. This same corporation appears to hold the mark "wonder-board" as well, dating from the 70s and 80s.
