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US Patent: 10,500
Tool Holder. Two jaws actuated by threaded sleeve
Patentee:
Dexter H. Chamberlain - Boston, MA

USPTO Classifications:
30/366, 74/543

Tool Categories:
industrial tools : tool holders
tool holders

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
Unknown

Patent Dates:
Granted: Feb. 07, 1854

Patent Pictures:
USPTO pdf tiff
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Description:
Idea predates Barber patent.

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