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US Patent: 791,115
Chuck or Tool Holder for Rock Drilling Machines
Patentee:
William C. Stephens (exact or similar names) - Carn Brea, Cornwall County, England

USPTO Classifications:
279/84

Tool Categories:
stoneworking : stone boring and drilling machines

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
Unknown
Patent Dates:
Applied: Jun. 16, 1904
Granted: May 30, 1905

Patent Pictures:
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