USPC 244/138

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"Devices for safely lowering persons, cargo or aircraft structure to the ground."

Enclosing categories USPC 244
Subcategories USPC 244/139, USPC 244/140, USPC 244/142
Keywords Passenger, Cargo, CPC B64D1/02, CPC B64D1/14, CPC B64D17/00
Start year
End year


Links

Correspondence with CPC according to USPTO