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The institution you're looking for was/is the Universitatea Politehnică din București. Professor Mateescu patented his giropter in 1923. So, at least patent images should be available. Unfortunately, the Romanian version of Espacenet only goes back to the mid 1980s. The Oficiul de Stat pentru Invenții și Mărci seems to be only interested in modern patent applications. Perhaps a Romanian-speaker SPF member could check with OSIM?From Romanian Aeronautical Constructions 1905-1974, Ion Gudju, Gheorghe Iacobescu, and Ovidiu Ionescu, Military Publishing House, Bucharest, 1974, pg 32"In 1923, college teacher Stan Mateescu of Bucharest designed and built an interesting machine which he patented that year. Called Giropter, it had two lifting propellers (on vertical axles) powered by an 80-HP Gnome engine, and a tractor airscrew powered by a 35-HP Anzani engine. The length of the giropter’s fuselage was 10 m and its height 2.80 m. The field diameter of the two lifting propellers was 10 m and 6 m respectively. The weight of the machine amounted to 850 kg."- https://upload.wikimedia.org/wikipedia/commons/7/7f/Romanian_Aeronautical_Constructions_1905-1974.pdf
The institution you're looking for was/is the Universitatea Politehnică din București. Professor Mateescu patented his giropter in 1923. So, at least patent images should be available. Unfortunately, the Romanian version of Espacenet only goes back to the mid 1980s. The Oficiul de Stat pentru Invenții și Mărci seems to be only interested in modern patent applications. Perhaps a Romanian-speaker SPF member could check with OSIM?
From Romanian Aeronautical Constructions 1905-1974, Ion Gudju, Gheorghe Iacobescu, and Ovidiu Ionescu, Military Publishing House, Bucharest, 1974, pg 32
"In 1923, college teacher Stan Mateescu of Bucharest designed and built an interesting machine which he patented that year. Called Giropter, it had two lifting propellers (on vertical axles) powered by an 80-HP Gnome engine, and a tractor airscrew powered by a 35-HP Anzani engine. The length of the giropter’s fuselage was 10 m and its height 2.80 m. The field diameter of the two lifting propellers was 10 m and 6 m respectively. The weight of the machine amounted to 850 kg."
- https://upload.wikimedia.org/wikipedia/commons/7/7f/Romanian_Aeronautical_Constructions_1905-1974.pdf
