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

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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
INPADOC family ID
Number of text pages 2
Number of diagram pages 1
Number of figures 2
Number of claims 1