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US Patent: 2,883,758
Apparatus for measuring the size and symmetry of an opening formed in a work piece
Patentee:
Charles Zelnick (exact or similar names) - Saginaw, MI

USPTO Classifications:
33/544.5

Tool Categories:

Assignees:
Lufkin Rule Company - Saginaw, MI

Manufacturer:
Not known to have been produced

Witnesses:
Unknown

Patent Dates:
Applied: Dec. 07, 1956
Granted: Apr. 28, 1959

Patent Pictures:
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