Patent GB-1913-16621

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Year filed 1913
Year granted 1913
Office GB
Patent number 16621
Inventors Karl Pollacsek
Inventor country HU
Applicant person Karl Pollacsek
Applicant firm
Applicant type INDIV
Applicant is inventor? 1
Original title Improvements in or relating to Propellers for Flying Machines and the like
English title Superimposed propellers rotating in opposite directions, avoiding uneven strain, suitable (directly) for lift as well as propulsion
Tech fields propellers, lift, propulsion, helicopter
Filing date 1913-07-19
Full specification filed date
Application number 191316621D
Grant date
Granted? 0
Publication date
Supplementary to patent Patent CH-1912-59557
Related to aircraft? 1
Serial number
Patent agent Kilburn & Strode
Assigned to
National tech categories
IPCs IPC B64C27/54
CPCs CPC B64C27/54
Family year 1913
First filing? 0
Cites these patents
Citations from after 1930
Application ID 23654359
INPADOC family ID 11139689
Number of text pages 3
Number of diagram pages 1
Number of figures 3
Number of claims 3


Sources

("Helicopter" is not spelled out here, and neither is "hybrid", though applicability of the propellers to lift, or perhaps rather ascension, is made fairly explicit. Reference is made herein to Patent CH-1912-59557.)