The palatial 15th floor headquarters of the now-defunct Knight Ridder chain have been leased to a law firm, but the company’s signs aren’t changing, the Merc reports. Rights to the two signs, weighing a total of 57,000 pounds, would have gone to the company that leased at least four floors in the 17-story tower at 50 W. San Fernando St. in San Jose. But since none of the incoming tenants took that much space, the signs stay.