Items

Items

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  [CJ617ADI], Test Report, Otto Grothe, October 1st, 1909

  1909-10-01
• No image

  [NA142AAA], Technical Note, Otto Grothe, Thomas Alva Edison, May 13th, 1907

  1907-05-13
• No image

  [NA142AAB], Technical Note, Thomas Alva Edison, Otto Grothe, May 31st, 1907

  1907-05-31
• No image

  [NA142AAC], Technical Note, Walter Elam Holland, Otto Grothe, May 14th, 1907

  1907-05-14
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  [X001A2L], Letter from Otto Grothe to Thomas Alva Edison, March 22nd, 1907

  1907-03-22