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US Patent: 171,505
Improvement in power-belts
Patentee:
Spencer M. Clark (exact or similar names) - Washington, DC

USPTO Classifications:
474/265

Tool Categories:
industrial machines : industrial machine mechanisms : industrial machine pulleys and belt drive mechanisms

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
Unknown
Patent Dates:
Applied: Jul. 02, 1875
Granted: Dec. 28, 1875

Patent Pictures:
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