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US Patent: 1,710,414
Drafting Implement Compass for Drawing Parallel Lines
Patentee: Hector Falletta (exact or similar names) - Los Angeles, CA USPTO Classifications: 33/41.5, 33/558.2 Tool Categories: layout tools : compasses Assignees: None Manufacturer: Not known to have been produced Witnesses: Unknown	Patent Dates: Applied: May 07, 1927 Granted: Apr. 23, 1929 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Ralph Brendler
Description: This compass features a third arm and fence to allow it to be used for drawing parallel lines. It is designed for drawing musical notations.

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