Ferrell, Frank J.
unknown · Contribution: 1880s
Industrial & Mechanical
Patented valves, a steam trap, and a snow-melting apparatus; labor union organizer
Portraits are AI-generated interpretations, not photographs.
Quick facts
- Active since
- 1880s
- Category
- Industrial & Mechanical
Impact on the world
Ferrell combined mechanical invention with labor activism, building a manufacturing business while pressing one of the era's great unions to live up to its interracial ideals.
Sources
- Google Patents (US 420,993 & US 468,242)
1 more sources and references are available to members.
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