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GB1014861A
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Improvements in and relating to protective buildings for swimming pools
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Helicorter
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Rotary wing aircraft
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Improvements in and relating to helicopters
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Rotary wing aircraft
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Aircraft tailplane
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Rotative wing aircraft
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Rotating wing aircraft
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DE646149C
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Elevator for steep screwdrivers
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DE662621C
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Steep helicopter wing
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Helicopter and rotating wing aircraft
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Helicopter and rotating wing aircraft
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Control lever for aircraft, or similar rocking lever devices in control mechanisms
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Rotative wing aircraft
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US2121345A
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Rotative wing aircraft
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