Szellemi Tulajdon Nemzeti Hivatala
Szellemi Tulajdon Nemzeti Hivatala (SZTNH) is the current National Intellectual Property Office of Hungary, as differentiated from the "Magyar Kiralyi Szabadalmi Hivital" ("Hungarian Royal Patent Office") which was active during the period we're studying.
The current Szellemi Tulajdon Nemzeti Hivatala is looking to be helpful. The Szellemi Tulajdon Nemzeti Hivatala patent database is not exceedingly difficult to use. Magyar(Hungarian) search terms are the key. "Repülőgép" (airplane or aircraft), for instance, entered into the field "Együttes keresés a fenti mezőkben:"(that is, Search together in the fields above:), cross-referenced with beginning and ending date parameters, is one of the quickest ways of gathering data. (Other fields will of course be helpful, as will prime patent title words beyond "Repülőgép". We are currently following leads via patents filed in nations other than Hungary, and keeping the new per se Hungarian data search focused specifically around the airplane.)
In general, it is more reliable to avoid links to individual SZTNH patent pages and to follow protocols such as those outlined above via the Hungarian National Intellectual Property Office patent database. The data is sparse, good for modest international patent corroboration. The Szabadalmi Kőzlőny patent catalogues will still be most handy.
Via the Szellemi Tulajdon Nemzeti Hivatala datebase in anglophone setting, choosing the Patent option, among the Advanced search on the left of the page, and using patent classification “V/h” as the keyword, hundreds of Hungarian patents of aviation are to be found. See our HU V/h. (This is a national case in which antique national classifications have been well-integrated into a modern type-searchable database. That is, “V/h” will bear more fruit than “Repülőgép”.)