Willard & Kelsey Solar Group LLC laid off about 40 people indefinitely at the beginning of January until changes to its production line are completed, a company official said Monday. Michael Cicak, the company's chief executive officer and chairman of the board, would not say when the changes would be completed or when the laid-off employees could return to work. "We have some technical people in here improving the efficiency of the assembly line," Mr. Cicak said, adding that the Perrysburg-based facility still has about 30 employees. He said Willard & Kelsey has a little more than 80 employees when...