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US Patent: 980,019
Valve-disk-cutting machine
Patentees:
Thomas B. Williams (exact or similar names) - Orange, MA
Frank L. Smith (exact or similar names) - Chicago, IL

USPTO Classifications:
451/430, 82/172

Tool Categories:

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
Fred A. Dexter
James D. Kimball
Julia S. Abbott
M. Gertrude Ady

Patent Dates:
Applied: Dec. 12, 1908
Granted: Dec. 27, 1910

Patent Pictures:
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Google Patents
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