(under the class definition) Structure including a sheetlike substantially imperforate member having ribs, flanges, or other projections formed of the material of the member and acting to strengthen it, e.g., a corrugated sheet.
SEE OR SEARCH THIS CLASS, SUBCLASS:
671+, for a corrugated expanded metal sheet.
782.1+, for a hollow or sandwich panel with a corrugated sheet component and see notes.
SEE OR SEARCH CLASS
428, Stock Material or Miscellaneous Articles,
604, for metallic stock material having intersecting corrugations.
