(under subclass 367) Subject matter wherein the shape of the piezoelectric element is essentially that of a solid rectangle, i.e., having three pairs of parallel sides.
(1) Note. Subject matter of this subclass type may include, for example, a cube.
(2) Note. Slight deviations from the exact shape specified above will not operate to exclude the device from this
subclass if the overall appearance of the element remains rectangular, i.e., one or more pairs of sides may not be exactly parallel, one or more surfaces may be grooved or machined, edges may be rounded, or holes may be in or pass through the device.
