Patent GB-1911-5695

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From google patents description: "Screw propellers.-In a screw propeller the blades a, b, c are situated in different planes and are of increasing radius from front to rear, each blade being attached to a separate boss, and being symmetrically arranged on the shaft d."

  • Tech class: CPC B64C11/48: Units of two or more coaxial propellers
  • Inventor location: Wiener Neustadt, Lower Austria ; Gentleman
  • We don't see the actual grant of the primary patent in Austria
  • This 1921 source apparently refers to inventor Justus Pruner, or Conrad Justus Pruner, as an owner of a factory, supporting a railroad-car startup firm: [1]. The source itself is a journal whose name makes reference to aircraft flight: Verordnungs-Blatt für Eisenbahnen und Schiff- und Luftfahrt. Don't know if we've seen that source elsewhere.

Sources


Year filed 1911
Year granted 1911
Office GB
Patent number 5695
Inventors Justus Pruner
Inventor country AT
Applicant person Justus Pruner
Applicant firm
Applicant type INDIV
Applicant is inventor? 1
Original title Screw Propeller
English title Screw Propeller
Tech fields propeller
Filing date 1911-03-07
Full specification filed date
Application number 191105695D
Grant date 1911-11-02
Granted? 1
Publication date
Supplementary to patent Patent AT-1911-01-07-Pruner
Related to aircraft? 1
Serial number
Patent agent Cruikshank & Fairweather, Limited
Assigned to
National tech categories
IPCs IPC B64C11/48
CPCs CPC B64C11/48
Family year 1911
First filing? 0
Cites these patents
Citations from after 1930 1
Application ID 23613267
INPADOC family ID 11104308
Number of text pages 2
Number of diagram pages 1
Number of figures 2
Number of claims 1