Nikkei slips from 1-mth high as U.S. earnings disappoint; Sony outperforms

* Sony rises after report it will cut about 1,000 jobs * Komatsu, Hitachi Construction off on Caterpillar earnings By Ayai Tomisawa TOKYO, Jan 28 (Reuters) - Japan's Nikkei share average retreated from a one-month high on Wednesday morning as disappointing U.S. earnings and weak U.S. economic data triggered profit-taking, while Sony Corp outperformed after sources said it will cut about 1,000 jobs. The Nikkei was flat at 17,762.13 in mid-morning trade after opening 0.9 percent l