View source for Patent HU-1915-71940

=== Sources ===
* [http://epub.hpo.hu/e-kutatas/?lang=EN the Szellemi Tulajdon Nemzeti Hivatala search engine], choosing the Patent option, among the Advanced search on the left of the page, and using patent classification “V/h” as the keyword
* (Virtual or direct analogue access to [[Szabadalmi Kőzlőny]] will facilitate the gathering of other data.)
* Inventor location: Tatatóváros (or simply Tata), Hungary

{{Patent
|Year filed=1915
|Year granted=1918
|Office=HU
|Patent number=71940
|Inventors=Schwarz József
|Inventor country=HU
|Applicant person=Schwarz József
|Applicant type=INDIV
|Applicant is inventor=yes
|Original title=Irányzókészülék légjárművek számára
|English title=Directional device for air vehicles
|Tech field=steering; control
|Filing date=1915.11.29
|Full specification filed date=
|Application number=
|Grant date=
|Granted=yes
|Publication date=1918.01.15
|Supplementary to patent=
|Related to aircraft=yes
|Serial number=
|Patent agent=
|Assigned to=
|National tech categories=HU V/h
|IPCs=
|CPCs=
|Family year=1915
|First filing=
|Citations from after 1930
|Cites these patents=
|Application ID=
|INPADOC family ID=
|Number of text pages=
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|Number of claims=
}}