Patent 8368476 was granted and assigned to Seiko Epson on February, 2013 by the United States Patent and Trademark Office.
A resonator element includes: a base portion, a first resonating arm that is extended from the base portion along a first direction, and a second resonating arm that is extended from the base portion along a first direction opposite to the first resonating arm, wherein the first resonating arm and the second resonating arm are arranged such that a base end portion of one side resonating arm and a middle portion of the other side resonating arm are arranged in the second direction orthogonal to the first direction.