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US2921311A
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Directional aerials
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Aerial for wide frequency bands
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Improvements in or relating to delay networks
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Improvements in or relating to wide band aerials
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Wide band dipole antenna
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Radio navigation-aiding system for aircraft
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Improvements in or relating to remote control systems
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Directional aerial system
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Radio electric circuits
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Frequency band filters
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Improvements in or relating to electrical communication systems utilising pulse modulation
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Improvements in or relating to radio receivers and other receivers of electrical oscillations
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Improvements in or relating to navigation aiding radio systems
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Improvements in or relating to electron discharge tubes
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Improvements in or relating to electron discharge tube neutralising circuit arrangements
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Improvements in or relating to radio navigation aiding systems
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Improvements in or relating to target detecting systems
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Improvements in or relating to operating circuit arrangements for oscillographs
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