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3768923
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Patent Grant
3768923
References
Source
Patent Number
3,768,923
Date Filed
Not available
Date Issued
Tuesday, October 30, 1973
50 years ago
CPC
F03D7/0236 - by changing the active surface of the wind engaging parts
B64C11/003 - Variable-diameter propellers; Mechanisms therefor
B64C27/46 - Blades
F05B2240/2021 - by means of telescoping blades
F05B2240/313 - with adjustable flow intercepting area
Y02E10/721 - Blades or rotors
Y02E10/723 - Control of turbines
US Classifications
416 - Fluid reaction surfaces
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