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US Patent: 233,488
Art of Manufacturing Mathematical Instruments
Patentee:
Samuel Darling - Providence, RI

USPTO Classifications:
451/449, 82/152, 82/173, 82/900

Tool Categories:

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
John E. Hall
Henry Drury
Benjamin Gridley
George H. Smith

Patent Dates:
Applied: Dec. 15, 1879
Granted: Oct. 19, 1880

Patent Pictures:
USPTO pdf tiff
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