Patent classifications
B
PERFORMING OPERATIONS; TRANSPORTING
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B64
AIRCRAFT; AVIATION; COSMONAUTICS
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B64G
COSMONAUTICS; VEHICLES OR EQUIPMENT THEREFOR
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B64G1/22
Parts of, or equipment specially adapted for fitting in or to, cosmonautic vehicles
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B64G1/62
Systems for re-entry into the earth's atmosphere; Retarding or landing devices
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B64G1/623
Retarding devices, e.g. retrorockets
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