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US Patent: 878,776
Self Tightening Bushing Tool Holder and Tools
Patentee:
Enos S. Costa (exact or similar names) - Quincy, Norfolk County, MA

USPTO Classifications:
125/41

Tool Categories:
stoneworking

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
Unknown
Patent Dates:
Applied: Nov. 01, 1907
Granted: Feb. 11, 1908

Patent Pictures:
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