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US Patent: 1,457
Manner of relieving the collars of circular saws from the friction occasioned by the article sawed
Patentees:
James Sproat (exact or similar names) - Taunton, MA
Manassah Andrews (exact or similar names) - Taunton, MA

USPTO Classifications:
144/181, 83/469, 83/676

Tool Categories:
woodworking machines : circular saws

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
James P. Ellis
H. G. O. Colby
Patent Dates:
Granted: Dec. 31, 1839

Patent Pictures:
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