USPC 244/138
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"Devices for safely lowering persons, cargo or aircraft structure to the ground."
Enclosing categories | USPC 244 |
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Subcategories | USPC 244/139, USPC 244/140, USPC 244/142 |
Keywords | Passenger, Cargo, CPC B64D1/02, CPC B64D1/14, CPC B64D17/00 |
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