The supervision of stock market trading in Japan is to be tightened by the appointment of a team within the Ministry of Finance that will examine allegations of insider trading and stock manipulation . . . Avery International of Pasadena said it settled a patent infringement suit with Minnesota Mining & Manufacturing over a material used to attach disposable diaper tapes. Under the settlement, 3M agreed to pay Avery $15 million and future royalties over the next three years.