217,677 (Dynamo-Electric Machine), July 22, 1879

Brush, Charles Francis, 1849-1929

1879-07-22
2014-12-02

Patent 217,677 with illustrations and typed description, issued July 22, 1879, for improvements on Dynamo Electric Machine relating to the magnetic field

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Case Western Reserve University, digital content

http://hdl.handle.net/2186/ksl:spcbru01355

Charles F. Brush, Sr., Papers
Series 3: Patents (1872-1888)
Box 9
Folder 3