Patent classifications
B
PERFORMING OPERATIONS; TRANSPORTING
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B64
AIRCRAFT; AVIATION; COSMONAUTICS
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B64D
EQUIPMENT FOR FITTING IN OR TO AIRCRAFT; FLIGHT SUITS; PARACHUTES; ARRANGEMENT OR MOUNTING OF POWER PLANTS OR PROPULSION TRANSMISSIONS IN AIRCRAFT
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45/00
Aircraft indicators or protectors not otherwise provided for
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B64D45/0015
Devices specially adapted for the protection against criminal attack, e.g. anti-hijacking systems
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B64D45/0059
by communicating emergency situations to ground control or between crew members
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