[PT5130-F]
https://edisondigital.rutgers.edu/folder/PT5130-F
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[PT5130], Patent Application, Thomas Alva Edison, May 2nd, 1923
1923-05-02 -
[PT5130A], Letter from Thomas Alva Edison to William Abbott Hardy, February 1st, 1923
1923-02-01 -
[PT5130B], Technical Note, Thomas Alva Edison, February 2nd, 1923
1923-02-02 -
[PT5130C], Technical Note, Thomas Alva Edison, June 21st, 1923
1923-06-21 -
[PT5130D], Technical Note, William Abbott Hardy, 1923
1923-00-00