[PT032AJD-F]
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Items
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[PT032AJD], Patent Application, Thomas Alva Edison, March 2nd, 1909
1909-03-02 -
[PT032AJD1], Letter from Thomas Alva Edison to Frank Lewis Dyer, February 4th, 1909
1909-02-04 -
[PT032AJD2], Technical Note, Thomas Alva Edison, February 4th, 1909
1909-02-04 -
[PT032AJD3], Technical Note, Thomas Alva Edison, February 12th, 1909
1909-02-12 -
[PT032AJD4], Letter from Frank Lewis Dyer to Dyer Smith, February 12th, 1909
1909-02-12 -
[PT032AJD5], Technical Note, Thomas Alva Edison, February 15th, 1909
1909-02-15