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US Patent: 2,172,070
Chuck
Patentee:
Carl A. Palmgren - Chicago, IL

USPTO Classifications:
279/65, 279/74

Tool Categories:
woodworking tools : hand drills : drill chucks

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
Unknown

Patent Dates:
Applied: Mar. 26, 1938
Granted: Sep. 05, 1939

Patent Pictures:
USPTO pdf tiff
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"Vintage Machinery" entry for Palmgren Steel Products, Inc.

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