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US Patent: 157,695
Metal-Riveting Machines
Patentees:
John L. Piper (exact or similar names) - Pittsburg, Allegheny County, PA
John A. Nichols (exact or similar names) - Pittsburg, Allegheny County, PA

USPTO Classifications:
72/431, 72/446

Tool Categories:
specialty machines : riveting machines

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
Unknown

Patent Dates:
Applied: Oct. 28, 1874
Granted: Dec. 15, 1874

Patent Pictures:
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