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US Patent: 1,939,490
Compound tool
Patentee:
Joseph O. Dixon - Hanover, PA

USPTO Classifications:
407/44, 407/55, 408/146, 408/196

Tool Categories:

Assignees:
Mummert-Dixon Co. - Hanover, PA

Manufacturer:
Mummert-Dixon Co. - Hanover, PA

Witnesses:
Unknown

Patent Dates:
Applied: Jun. 30, 1930
Granted: Dec. 12, 1933

Patent Pictures:
USPTO pdf tiff
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"Vintage Machinery" entry for Mummert-Dixon Co.
Description:
"...the invention is there embodied in a compound, rotary spotting tool, which is used for making machined or smooth faces on bosses or on the surfaces of castings around bolt holes ad the like."

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