(under subclass 367) Subject matter wherein the shape of the piezoelectric element is such that its outer surface can be essentially generated by the revolution of a circle about one of its diameters or by one half of such a generated surface.
(1) Note. Subject matter of this subclass type may specifically include, for example, hollow spherical or hemispherical piezoelectric elements.
(2) Note. Slight deviations from the exact shape defined above will not exclude a piezoelectric element from this subclass if the overall shape of the element is spherical or hemispherical.
CROSS-REFERENCE ART COLLECTIONS
The following subclasses are collections of published disclosure pertaining to various aspects of the electrical generator or motor art which aspects do not form an appropriate base for subclass classification in the classification schedule.
(1) Note. Disclosures are placed herein for value as a search aid and in no instance do they represent the entire extent of the prior art.
