Blue Spark Technologies, Inc., the leading producer of thin, flexible, printed power source solutions, has closed a $7.5 million Series B investment. Existing institutional venture investors Early Stage Partners and SunBridge Partners were joined by several private investors. Gary R. Johnson, Blue Spark president and chief executive, said, “The Blue Spark team is delighted to have the support of new investors and the continuing confidence of early backers, who have provided additional reso...