I am a home crafter that sells my items at craft shows and online. I have had inquiries for these items and have made a few for friends and fam. I'd like to make them and display them for sale with my other wares at the shows and online. I found a source that said the game rules are no longer covered by patents, but the game pattern is. It's been in the zeitgeist for so long though I'm hoping some kind of public domain rules qualify here.