AH

Aalbert Adrianus van Helden

📍 The Hague, NL: #424 of 926 inventorsTop 50%
Overall (All Time): #3,165,051 of 4,157,543Top 80%
1
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Issued Patents All Time

Showing 1–1 of 1 patents

Patent #TitleCo-InventorsDate
8474746 Aircraft configured for vertically ascending and landing — 2013-07-02