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US Patent: 527,748
Grinding Mechanism
Patentee:
William H. Hill - Denver, Arapahoe County, CO

USPTO Classifications:
451/114

Tool Categories:
specialty machines : valve re-seating machines

Assignees:
William H. Hill - Denver, Arapahoe County, CO
Joshua Piccioli - Denver, Arapahoe County, CO

Manufacturer:
Not known to have been produced

Witnesses:
Unknown

Patent Dates:
Applied: Jun. 22, 1894
Granted: Oct. 16, 1894

Patent Pictures:
USPTO pdf tiff
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