What happens if you find a similar idea has already been patented?

Your invention may be novel and unique enough that you can still move forward. You may also consider working with the company that holds the patent. But don’t do anything until first consulting with a patent attorney. Another option is come up with a good "trademarkable" name and start manufacturing, but make sure you are not infringing on someone else's patent!

For our guide on how to do a patent search