- "Brush, Charles Francis, 1849-1929" (x)
- 1878-05-07 (x)
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Show morePatent 203,411 with illustrations and typed description, issued May 7, 1878, for improvements related to the carbon stick mechanism in electric lamps
Charles F. Brush, Sr., Papers
Series 3: Patents (1872-1888)
Box 9
Folder 3
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Charl
Show morePatent 203,412 with illustrations and description, issued May 7, 1878, for improvements relating to the commutator of an magneto electric machine
Charles F. Brush, Sr., Papers
Series 3: Patents (1872-1888)
Box 9
Folder 3
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C
Show morePatent 203,413 with illustrations and description, issued on May 7, 1878, for the improvement in efficiency of armatures for Dynamo Electric Machines
Charles F. Brush, Sr., Papers
Series 3: Patents (1872-1888)
Box 9
Folder 4
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