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US Patent: 22,474
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Harley Stone - Blackstone, MA

USPTO Classifications:
408/147, 408/195, 408/212

Tool Categories:
woodworking tools : hand drills : drill bits
woodworking machines : wood drilling and boring : wood drill bits
metalworking machines : drilling and boring : drill bits

Paul P. Todd - Blackstone, MA

Not known to have been produced

Daniel B. Pond
Walter Thorpe

Patent Dates:
Granted: Dec. 28, 1858

Patent Pictures:
USPTO pdf tiff
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