Sticky lawsuit: $400M dispute lingers over Post-it inventor

Alan Amron has invented a battery-powered squirt gun, a digital photo frame, even a laser system that may someday provide a visible first-down line for fans inside NFL stadiums. He holds 40 U.S. patents, but he's most interested ...

3M buying maker of products used to track people

(AP) -- Manufacturing conglomerate 3M Co. said Tuesday it has agreed to pay $230 million in cash for an Israeli company that makes ankle bracelets and other products used to keep track of people.

3M to acquire Cogent for about $943 million

(AP) -- 3M Co., the conglomerate whose products range from Post-Its to respirators, computer arms and films for LCD TV screens, is trying to expand into the security market by buying Cogent Inc. for about $943 million.