I found a really cool word game that I would like to implement as a mobile app, though I don't if anyone owns the right to the concept. I know there are many games out there, such as Poker or Crossword puzzles, that are in the public domain and I'm hoping this is one of them. I've done a patent search on google and a trademark search on the USPTO site and haven't found anything. How can I determine if someone owns the rights to the word game that I'd like to implement as a mobile app?
Thanks so much for your knowledge!