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US Patent: 442,801
Stone Grinding Wheel
Patentee:
George B. Eckhardt (exact or similar names) - Toledo, Lucas County, OH

USPTO Classifications:
451/551

Tool Categories:
stoneworking : stone dressing machines

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
Unknown
Patent Dates:
Applied: Apr. 14, 1890
Granted: Dec. 16, 1890

Patent Pictures:
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