Patent DE-1921-391722

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Espacenet gives this patent the priority date 1921-12-22. We are giving it the filing date 1921-12-21, based on our 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 1921
Year granted 1924
Office DE
Patent number 391722
Inventors Ernst Heinkel
Inventor country DE
Applicant person Ernst Heinkel‎
Applicant firm
Applicant type INDIV
Applicant is inventor? 1
Original title Endstück für hölzerne Flugzeugstreben
English title End piece for wooden aircraft struts
Tech fields airplane, frame
Filing date 1921-12-21
Full specification filed date
Application number
Grant date 1924-03-14
Granted? 1
Publication date 1924-03-14
Supplementary to patent
Related to aircraft? 1
Serial number
Patent agent
Assigned to
National tech categories DE 77h.5
IPCs IPC B64C3/18
CPCs CPC B64C3/185
Family year 1921
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 3
Number of claims 1