Patent DE-1908-239989

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Use of rigid air-chamber or ballonet with non-rigid aerostat for purpose of controlling gas pressure.

  • Inventor location; Schönberg bei Berlin

Patents which are supplementary to this one


Year filed 1908
Year granted 1911
Office DE
Patent number 239989
Inventors Paul Lehmann
Inventor country DE
Applicant person Paul Lehmann
Applicant firm
Applicant type INDIV
Applicant is inventor? 1
Original title Vorrichtung zur Änderung der Höhenlage von starren Ballons
English title Apparatus for changing the elevation of rigid balloons
Tech fields LTA, navigation, control, elevation, rigid, gas, ballonet, non-rigid, balloons, air pressure
Filing date 1908-01-18
Full specification filed date
Application number
Grant date
Granted? 1
Publication date 1911-10-26
Supplementary to patent
Related to aircraft? 1
Serial number
Patent agent
Assigned to
National tech categories DE 77h.3
IPCs IPC B64B1/62
CPCs CPC B64B1/62
Family year 1908
First filing? 1
Cites these patents
Citations from after 1930
Application ID
Number of text pages 2
Number of diagram pages 1
Number of figures 2
Number of claims 1