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