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US Patent: 1,564,017
Valve Grinder
Patentee:
Judson C. Pewther (exact or similar names) - Denver, CO

USPTO Classifications:
451/117, 74/320, 74/70

Tool Categories:
specialty tools : valve grinding tools

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
none listed
Patent Dates:
Applied: Aug. 07, 1922
Granted: Dec. 01, 1925

Patent Pictures:
Judson C. Pewther patent Dec. 1, 1925
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Description:
The innovation is the construction of metal stampings.

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