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Patent classifications
H
ELECTRICITY
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H01
ELECTRIC ELEMENTS
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H01Q
ANTENNAS, i.e. RADIO AERIALS
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11/00
Electrically-long antennas having dimensions more than twice the shortest operating wavelength and consisting of conductive active radiating elements
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H01Q11/02
Non-resonant antennas, e.g. travelling-wave antenna
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H01Q11/08
Helical antennas
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