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US Patent: 2,090,495
Surface test indicator
Patentee:
Eugene J. Witchger (exact or similar names) - Saginaw, MI

USPTO Classifications:
33/556

Tool Categories:

Assignees:
Lufkin Rule Company - Saginaw, MI

Manufacturer:
Not known to have been produced

Witnesses:
Unknown

Patent Dates:
Applied: Jan. 19, 1935
Granted: Aug. 17, 1937

Patent Pictures:
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