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US Patent: 416,719
Combined Drawing and Measuring Instrument
Patentee:
William G. Curtis (exact or similar names) - Philadelphia, PA

USPTO Classifications:
33/27.032, 33/458

Tool Categories:
rules : folding rules

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
Edward A. Oetzel
William Harr

Patent Dates:
Applied: Mar. 16, 1889
Granted: Dec. 10, 1889

Patent Pictures:
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