Actuall, the LFT website says 'patent pending', which means they have applied for a patent but have not necessarily been granted one. If you're serious about this bait, look into their patent and read it to see exactly what they're seeking protection on. I find it hard to believe that noone has ever done similar 'slots' before, and if it has been done before then their patent (even if granted) would not hold up in court. My 2 cents.