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US Patent: RE2,869
Improvement in the Manufacture of Metallic Squares
Patentee:
Samuel Darling - Bangor, ME

USPTO Classifications:
148/528, 148/529, 76/101.1

Tool Categories:
layout tools : squares : try squares

Assignees:
None

Manufacturer:
Unknown

Witnesses:
John E. Hall
A. L. Simpson

Patent Dates:
Granted: Feb. 18, 1868

Reissue Information:
Reissue of 18,327 (Oct. 06, 1857)

Patent Pictures:
USPTO pdf tiff
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Description:
Darling expands on his original patent 18327 which referenced an intent to patent the idea and process of hardening the edges of the squares of tongues and does so in this reissue of his patent.

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