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US Patent: 1,210,370
Combined Level and Square
Patentee: Jarsley Dvorak (exact or similar names) - Melvin, IA USPTO Classifications: 33/341, 33/382, 33/418, 33/451, 33/465 Tool Categories: layout tools : levels layout tools : squares Assignees: None Manufacturer: Not known to have been produced Witnesses: Unknown	Patent Dates: Applied: Jan. 15, 1916 Granted: Dec. 26, 1916 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Ralph Brendler
Description: This design joins two standard levels with a hinge, allowing them toe be used as a square or to level both sides of a corner.

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