(under subclass 402) Product wherein the nonthickness surfaces of a component deviate substantially from parallelism.
(1) Note. Mere compression of the sewn material incidental to a normal stitching operation will not be considered a substantial deviation from parallelism. However, a patent
claiming a groove or depression produced by the stitching thread will be placed in this subclass.
SEE OR SEARCH THIS CLASS, SUBCLASS:
420, for a product wherein the component of varying thickness is of fibrous material and is retained between other layers.
SEE OR SEARCH CLASS
428, Stock Material or Miscellaneous Articles, 156+, for similar nonsewn stock material.
