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US Patent: 357,771
Attachment for squares
Patentees:
C. Diedrich Janssen (exact or similar names) - Torrington, CT
William De Voe (exact or similar names) - Torrington, CT

USPTO Classifications:
33/458, 33/474

Tool Categories:

Assignees:
None

Manufacturer:
Unknown

Witnesses:
Frank Phelps
Isaac W. Brooks
Patent Dates:
Applied: Mar. 13, 1886
Granted: Feb. 15, 1887

Patent Pictures:
USPTO (New site tip)
Google Patents
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