Paul Wiseman And Michael Liedtke, The Associated Press WASHINGTON (AP) — Appearing in the biggest antitrust trial in a quarter century, DuckDuckGo founder Gabriel Weinberg testified Thursday that it was hard for his small search engine company to compete with Google because the powerhouse has deals with phone companies and equipment manufacturers to make its product the default search option on so many devices. “We hit an obstacle with Google's contracts," Weinberg said in U.S. District Court in Washington. The U.S. Department of Justice argues that Google has smothered competition by paying companies such as Apple and Verizon to lock…