I designed a Seattle Seahawk Superbowl fan appreciation logo. The logo says, "Seattle Seahawks" in a font that has not been used before and the photo is of the Seahawk that Seattle uses as their mascot. My company name is on the Seahawk and I omitted a couple of marks on the hawk. I thought this was legal to do? I was told it wasn't and all of my finished products now, cannot be sold. Can someone give me an example of how I could turn this into a legal piece of memorabilia. What do I need to do when designing something like this that will not cause a copyright infringement issue? I see the same Seahawk logo on all sorts of souvenirs and clothing. What are the other companies doing different then me that makes their finished product acceptable?