Items

Items

• 

  [E1121BN], Letter from Sigmund Bergmann to Thomas Alva Edison, October 16th, 1911

  1911-10-16
• 

  [E1315CA], Letter from Sigmund Bergmann to Thomas Alva Edison, September 26th, 1913

  1913-09-26
• 

  [E1315CK1], Letter from Sigmund Bergmann to Thomas Alva Edison, November 12th, 1913

  1913-11-12
• 

  [E1413BB], Letter from Deutsche Edison Akkumulatoren Co GmbH to Thomas Alva Edison, August 1914

  1914-08-00