By Malathi Nayak SAN JOSE, California (Reuters) – A top Apple Inc executive testified on Friday that Samsung Electronics Co Ltd undermined his companys marketing efforts, reputation and business by selling devices that copied the iPhone and iPad. Apple marketing chief Phil Schiller appeared as a witness during a damages retrial between the two companies in a San Jose, California, federal court. Schiller also denied that Apple launched the iPad mini as a response to competition in the tablet market, saying Apple was merely trying to make a better product. Its much harder to create demand and people question our innovation and design skills like people never used to, Schiller said, adding that Samsung weakened the world view of Apple as this great designer and innovator. Apple and Samsung are engaged in global litigation over each others patents.