Photographers advertisement in Russian newspaper <a href="https://en.wikipedia.org/wiki/Novoye_Vremya_(newspaper)" class="extiw" title="en:Novoye Vremya (newspaper)"><i>Novoe Vremya</i></a> on 21th January 1901: <i>"First atelier for electrophotographic artwork. Open since 10th January 1901. A. I. Rentz &amp; F. Schrader"</i>.
Фридрих Людвиг Германович Шрадер
1901
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