Patent US-1908-940866

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Propeller wheel with flexible blades, which expand on downstroke and contract on upstroke; adjustable position; multiple smaller concave aeroplanes next to primary wings

Inventor location: Baltimore city, Maryland

Sources

  • Short's DB
  • PTO 244
  • Neilson


Year filed 1908
Year granted 1909
Office US
Patent number 940866
Inventors Albert Hugo Friedel
Inventor country US
Inventor location Baltimore, Maryland
Applicant person Albert Hugo Friedel
Applicant firm
Applicant type INDIV
Applicant is inventor? Yes
Original title Flying-machine
English title Flying-machine
Tech fields propulsion, navigation, aerodynamics, stability
Filing date May 19, 1808
Full specification filed date
Application number 1908433713
Grant date November 23, 1909
Granted? Yes
Publication date
Supplementary to patent
Related to aircraft? Yes
Serial number 433713
Patent agent R. S. & A. B. Lacey
Assigned to 1
National tech categories USPC 244/20
IPCs
CPCs CPC B64C39/005
Family year 1908
First filing? Yes
Cites these patents
Citations from after 1930
Application ID 47247098
INPADOC family ID 43857395
Number of text pages 2
Number of diagram pages 3
Number of figures 9
Number of claims 12