(under subclass 117) Construction and arrangements of gas-containing units in lighter-than-air craft.
(1) Note. Devices for compressing or expanding one or more gas cells to alter their buoyancy are found in this class, subclass 97.
SEE OR SEARCH CLASS
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, and especially
175+, 190, 193, and 196+ for such a product embodying mechanically interengaged strands or strand-portions.
442, Fabric (Woven, Knitted, or Nonwoven Textile or Cloth, etc.), 59+, for a coated or impregnated fabric.
