ST. PAUL, Minn.--(BUSINESS WIRE)--3M (NYSE: MMM) today reported first-quarter earnings of $1.29 per share on sales of $6.3 billion. Operating income margins were 22.8 percent, up 7 percentage points year-on-year. Sales and per-share earnings increased 24.7 percent and 74.3 percent, respectively, versus the first quarter of 2009.
