(under subclass 311) Subject matter having a protective means in direct, intimate contact with all surfaces of the piezoelectric element.
SEE OR SEARCH CLASS
156, Adhesive Bonding and Miscellaneous Chemical Manufacture, appropriate subclasses for laminating methods including adding a moisture proof layer to an object.
264, Plastic and Nonmetallic Article Shaping or Treating: Processes,
272, for electrical component encapsulating.
427, Coating Processes, appropriate subclasses for moisture proofing by coating.
428, Stock Material or Miscellaneous Articles, appropriate subclasses for a stock material product in the form of a single or plural layer web or sheet, including a waterproof component, note especially
321, and 351 (in which the web or sheet is structurally defined or has a structurally defined element or component), and subclasses 411+ for a nonstructural laminate defined merely by the composition of the layers.
