I would like to start a business making a new product. The product would be made from a finished product from one manufacturer and modifing that product. As an example suppose I bought 3-m scotch tape with adhesive on one side and then coated the other side with another adhesive (say Dupont) , which would represent a double sided tape; and, then sold the product under another name - say Fancy Tape. Would I have to get the permission of either 3-M or Dupont to make this new product?