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US Patent: 143,531
Improvement in gaining-machines
Patentee:
John Richards (exact or similar names) - Philadelphia, PA

USPTO Classifications:
144/133.1

Tool Categories:
woodworking machines : joint making machines : dado machines

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
Unknown

Patent Dates:
Applied: Sep. 24, 1873
Granted: Oct. 07, 1873

Patent Pictures:
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