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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B64G1/10
Artificial satellites; Systems of such satellites; Interplanetary vehicles
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B64G1/1021
Earth observation satellites
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B64G1/1028
using optical means for mapping, surveying or detection, e.g. of intelligence
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