Patent DE-1922-390989

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This is an addition to Patent DE-1922-388401. We are giving this 390989 the filing date 1922-07-11, based on ours notes found on patent dates, it seeming that "Patentirt im Deutschen Reiche vom" is exactly one day after the filing date. Often, we approach German patents by way international references, so the above differential is corroborated via the international relation.


Year filed 1922
Year granted 1924
Office DE
Patent number 390989
Inventors Ernst Heinkel
Inventor country DE
Applicant person Ernst Heinkel
Applicant firm
Applicant type INDIV
Applicant is inventor? 1
Original title Leitfläche für Hoehensteuer von Flugzeugen
English title Guidance surface for aircraft altitude control
Tech fields airplane, control, rudder
Filing date 1922-07-11
Full specification filed date
Application number
Grant date 1924-03-03
Granted? 1
Publication date 1924-03-03
Supplementary to patent Patent DE-1922-388401
Related to aircraft? 1
Serial number
Patent agent
Assigned to
National tech categories DE 77h.5
IPCs IPC B64C9/02
CPCs CPC B64C9/02
Family year 1922
First filing?
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