| Outline |
Indent Level
| |
| Color | Curly Brackets (indicating CPC extensions to IPC) | |
CPC | COOPERATIVE PATENT CLASSIFICATION | ||
![]() | LIGHTER-THAN AIR AIRCRAFT |
![]() | Lighter-than-air aircraft |
B64B 1/005 | . | { Arrangements for landing or taking-off e.g. alighting gear} |
![]() | . |
![]() | . | Rigid airships; Semi-rigid airships (B64B 1/58 takes precedence) |
B64B 1/08 | . . | Framework construction |
B64B 1/10 | . . | Tail unit construction (B64B 1/12 takes precedence) |
B64B 1/12 | . . | Movable control surfaces |
![]() | . . | Outer covering |
B64B 1/20 | . . |
B64B 1/22 | . . | Arrangement of cabins or gondolas |
![]() | B64B 1/24 | . . | Arrangement of propulsion plant (B64B 1/34 takes precedence) |
B64B 1/26 | . . . | housed in ducts |
B64B 1/28 | . . . | housed in nacelles |
![]() | B64B 1/30 | . . . | Arrangement of propellers |
B64B 1/36 | . . | Arrangement of jet reaction apparatus for propulsion or directional control |
B64B 1/38 | . . | Controlling position of centre of gravity |
![]() | . | Balloons (B64B 1/58 takes precedence; toy balloons A63H 27/10) |
B64B 1/42 | . . | Construction or attachment of stabilising surfaces |
B64B 1/44 | . . | adapted to maintain predetermined altitude |
![]() | B64B 1/46 | . . | associated with apparatus to cause bursting |
![]() | B64B 1/50 | . . | Captive balloons |
![]() | . | Arrangements or construction of gas-bags; Filling arrangements |
B64B 1/60 | . . | Gas-bags surrounded by separate containers of inert gas |
B64B 1/62 | . . | Controlling gas pressure, heating, cooling, or discharging gas |
B64B 1/64 | . . | Gas valve operating mechanisms |
B64B 1/66 | . | Mooring attachments (mooring masts B64F) |
B64B 1/68 | . | Water flotation gear |
B64B 1/70 | . | Ballasting arrangements |