Letter from Columbus Delano, U.S. Interior Dept. Secretary to U.S. Patent Office. Commissioner, March 30th, 1875

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Author(s)

U.S. Interior Dept. Secretary
Delano, Columbus
Recipient(s)
U.S. Patent Office. Commissioner
Others Mentioned
Edison, Thomas Alva

Subject(s)

Multiple telegraphy (duplex, quadruplex)
Patent application

Dated

1875-03-30 (1875)

Associated Images

1

Identifier

QCA04004 (legacy)

Rights

Thomas Edison National Historical Park

Publisher

Thomas A. Edison Papers, School of Arts and Sciences, Rutgers University
 

Citation

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