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US Patent: 1,295,749
Combined Levelling and Self Computing-Cross Section Rod Surveyor's Rule
Patentee: Ernest B. Hiatt (exact or similar names) - Winterset, IA USPTO Classifications: 33/294 Tool Categories: rules trade specific : surveyor Assignees: None Manufacturer: Not known to have been produced Witnesses: Unknown	Patent Dates: Applied: Dec. 20, 1917 Granted: Feb. 25, 1919 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Ralph Brendler
Description: This rule features several unusual sliding scales which can be used by surveyors for laying out and levelling roads.

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