Design Patents: Protecting Aesthetic Innovation

What is the difference between a design patent and a utility patent, and which receives more protection under federal law?  Peter Afrasiabi answers this question while explaining the key aspects of patent law, common defenses to patent claims including functionality, obviousness, invalidity/prior art and potential damages in the context of famous patent cases involving Apple, LA Gear, Crocs, Nike and Columbia Sportswear.  Peter also shares valuable practice pointers for lawyers grappling with patent issues and claims.