Biyu Chen just invented a new product that she believes is unique and will make her wealthy. The product is a toothbrush with a tube of toothpaste attached to the handle. Biyu is anxious to file a patent application on the product but, after hearing about the idea, you say, “Whoa, let’s do a preliminary patent application search first to see if someone else already has a patent for this idea.” What do you find when you help Biyu with the preliminary search?