A state appeals court ruled Monday that a Cook County tax violated state law, a second strike against a fee the county hoped would produce about $14 million in revenue this year. In November 2012, the Cook County Board adopted a 1.25 percent non-titled personal property use tax on any non-titled item valued at or above $3,500 that was bought outside Cook County then brought in. The county passed the tax seeking to close what it saw as a loophole allowing people to save a small percentage on items like TVs, furniture …