CPC B64B
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This is a broad category in the Cooperative Patent Classification (CPC) system. CPC B64 has aviation transportation technology categories, and B64B focuses on lighter-than-air ones.[1][2]
The immediate child of B64B is CPC B64B1/00, which contains numerous patents for LTA aircraft. All other subcategories are filed as children of the latter.
References
- ↑ B64B elements listed at Espacenet
- ↑ B64B elements listed at USPTO
| Enclosing categories | CPC B64 |
|---|---|
| Subcategories | CPC B64B1/00 |
| Keywords | LTA, Balloon, Dirigible |
| Start year | |
| End year |
