(under subclass 355) Boat hulls in which the hull is substantially formed of a plastic.
SEE OR SEARCH CLASS
264, Plastic and Nonmetallic Article Shaping or Treating: Processes, appropriate subclasses for specific methods of forming plastics which could be used to shape a boat hull.
425, Plastic Article or Earthenware Shaping or Treating: Apparatus,
61, for means to facilitate the flotation of a formed ship or boat.