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GB462037A
|
|
One-blade air screw propeller or screw wind wheel
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|
US2107785A
|
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Variable pitch propeller for aircraft
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|
GB460921A
|
|
Variable pitch propellers
|
|
GB439624A
|
|
Screw propellers
|
|
US2088853A
|
|
Propeller
|
|
GB448361A
|
|
Variable pitch propeller for air craft
|
|
US2021999A
|
|
Air propeller
|
|
GB444746A
|
|
Air propellers
|
|
ES129248A1
|
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Procedure or device for obtaining protective covers on aerial helices.
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|
GB390619A
|
|
Aeronautical propellers
|
|
ES125701A1
|
|
Improvements in aerial propellers.
|
|
GB391200A
|
|
Screw propellers for air craft
|
|
DE551742C
|
|
Processing of objects with a screw-like surface, in particular air and water screws
|
|
DE552908C
|
|
Process for the production of a protective cover for wooden propellers
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