| With tact-tiles and dungeon tiles, can you really trademark the design sicne jig-saw puzzles which these classify in a way as is already public domain design? All i can think is the artwork or manufacturing process that is held by the companies, but anyone could make these things with other art or another way.
The problem with dungeon tiels is the new amterial using older tiles that are out of print long before the edition was in print so no one can reproduce the dungeons using them so why would they buy the newer tiles when they cont have the older tiles required to go with them?
This is something that should have never gone out of print as long as they are used in in current products which means prices should not be silly high for some collector tiem that should be a standard accessory for the game. | 
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