Alvaro Da Cunha
His name seems common in Portuguese or Brazilian history so although there are several hits in a Web search of similar names, it's not been easy to find biographical materials that are definitely about him.
Patents whose inventor or applicant is Alvaro Da Cunha
- Patent FR-1911-429645 (English title: Improvements to aeroplanes, actually an airplane-helicopter hybrid, Filing date: 1911-05-12)
- Patent FR-1912-429645.15915 (English title: Improvements in airplanes, actually an airplane-helicopter hybrid, Supplementary to patent: Patent FR-1911-429645, Filing date: 1912-05-13)
- Patent FR-1912-429645.16915 (English title: 1st certificate of addition to the patent taken, 12 May 1911, for refinements to aeroplanes, Supplementary to patent: FR-1911-429645, Filing date: 1912-05-13)