[PT032AJS-F]
https://edisondigital.rutgers.edu/folder/PT032AJS-F
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[PT032AJS], Patent Application, Thomas Alva Edison, October 21st, 1910
1910-10-21 -
[PT032AJS1], Technical Note, Thomas Alva Edison, October 17th, 1910
1910-10-17 -
[PT032AJS2], Letter from Frank Lewis Dyer to Dyer Smith, 1910
1910-00-00 -
[PT032AJS3], Letter from Frederick Bachman to Frank Lewis Dyer, November 3rd, 1911
1911-11-03