Materials Eberler

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France

   Conrad Schlumberger (2 October 1878 in Gebweiler (Alsace-Lorraine) – 9 May 1936 in Stockholm) and

   Emile Henry Marcel Schlumberger (21 June 1884 in Gebweiler – 9 May 1953 in Val-Richer) were brothers from the region of Alsace-Lorraine, France, then a part of the German Empire. Their inventions in the area of geophysics and well logging were the beginnings of Schlumberger Well Services and the entire well logging industry.
   
   Jean Schlumberger

      Germany
   Christoph Graf zu Stolberg-Stolberg
   Otto Rudolph Wilckens (1876-1943) Geologist and paleontologist.
 
      USA

   Herbert Hoover Mining engineer 
Herbert Charles Hoover (August 4, 1903 – July 9, 1969) was an engineer, businessman, and politician who served as United States Under Secretary of State from 1954 to 1957.[1] He was the elder son of President Herbert Hoover.

   Pierre Schlumberger (1914 – February 18, 1986) was an American businessman. He was the chief executive of Schlumberger, the world's largest oilfield services
company.