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US Patent: 71,609
Improvement in machines for dressing the frames of slates
Patentee:
Henry W. Harper - Berlinsville, PA

USPTO Classifications:
144/136.1, 144/38

Tool Categories:
woodworking machines : sanding machines

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
Unknown

Patent Dates:
Granted: Dec. 03, 1867

Patent Pictures:
USPTO pdf tiff
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