128 Airship gas cell construction and arrangement:
This subclass is indented 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 subclasses 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.), subclasses 59+ for a coated or impregnated fabric.
|Enclosing categories||USPC 244, USPC 244/117|