Developed the "Ohnesorge four-wire circuit," which enabled the first telephone connection between the western front at Charleville-Mézières and Constantinople
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Developed the "Ohnesorge four-wire circuit," which enabled the first telephone connection between the western front at Charleville-Mézières and Constantinople
Text from Wikipedia, available under CC BY-SA 4.0.
Captured 2026-08-18 from Wikipedia. The archived copy is preserved so this citation survives link rot.