Sears, Roebuck and Co yesterday said it would defend a federal lawsuit filed against mail-order retailer Lands' End Inc accusing it of copyright infringement. Sears, which acquired Lands' End in June for $1.9 billion, says it will "vigorously defend" the allegations made by motivational speaker and author Sherry Maysonave who claims Lands' End used her original copyrighted material on the company's Web site and in its catalogues without her permission.