Tylan Corp. has completed its previously reported...

Tylan Corp. has completed its previously reported acquisition of privately held Microsensor Technology. Terms of the cash transaction were not released . . . Lotus Development said it filed a copyright infringement suit in federal court against Management Information Source, a Portland, Ore.-based publishing company . . . Singer Co. reported that it has reached agreements to sell most of its remaining European sewing machine marketing operations to unidentified parties . . . Assets of the nation’s 346 money-market mutual funds fell $3.10 billion in the week ended June 26, the Investment Company Institute said.