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US Patent: 20,711
Engravers Tool
Ring Clamp for Engravers
Patentee:
Thomas R Hopkins (exact or similar names) - Petersburg, VA

USPTO Classifications:
269/131, 269/6, 279/39, 74/557, 81/4, 81/64

Tool Categories:

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
H Haines
Wm. N Haines
Patent Dates:
Granted: Jun. 29, 1858

Patent Pictures:
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