 Shares of Manitowoc Co. MTW, 0.51 fell more than 5 in the extended session Tuesday after the maker of cranes and other construction equipment reported mixed first-quarter results, beating analyst expectations on revenue, and said demand for cranes continues unabated despite clear signs of economic slowdown. Manitowoc said it earned 3.1 million, or 9 cents a share, in the quarter, reversing a loss of 3.1 million, or 9 cents a share, in the year-ago quarter. 