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US Patent: 1,429,999
Combined Depth and Angle Gauge
Patentee: Ernest Barlow (exact or similar names) - Foleshill, Coventry England USPTO Classifications: 33/464, 33/471 Tool Categories: layout tools : protractors layout tools : measurement gauges Assignees: None Manufacturer: Not known to have been produced Witnesses: Unknown	Patent Dates: Applied: May 04, 1920 Granted: Sep. 26, 1922 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Ralph Brendler
Description: This is a protractor with an adjustable tongue to allow it to be used as a depth gauge.

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