Luxembourgish patent classifications

Currently the closest thing we know about to a patent classification system in Luxembourg is the subject-matter index of the Luxembourg patent list, a supplement to the official Mémorial. This contained a category, Aérostat into which several aeronautics patents were grouped. The latest publication of this type, that we know about, is dated 1899, so we do not have similar classifications for later patents.

Enclosing categories	Patent classification systems
Subcategories	LU Aérostat
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