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US Patent: 1,419,645
Plotting Instrument Navigator's Dividers
Patentee: Frank R. Santori (exact or similar names) - New York, NY USPTO Classifications: 33/558.2 Tool Categories: layout tools : compasses : dividers Assignees: None Manufacturer: Not known to have been produced Witnesses: G. V. Rasmussen	Patent Dates: Applied: Dec. 10, 1920 Granted: Jun. 13, 1922 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Ralph Brendler
Description: This is a standard set of dividers, with an extension arm to allow it to measure a secondary distance.

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