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https://www.kickstarter.com/projects/1747224222/wham-o-the-square-frisbee
Seems like the "auto stability" feature would be interesting. At least for tunnel shots. lol..
Sonic is a common word it cannot be trademarked as a word. A design of the word Sonic which is unique can be, as well if Sonic is the title of something like Sonic the Headgehog. Or if you changed the spelling. Like to like Sonik.
This is the reason why big pharma makes up words for their products or uses extra letters, scientific names cannot be trademarked either.