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US Patent: 116,805
Improvement in Combined Gauges and Try Squares
Patentee: Frederic Castle (exact or similar names) - Montana, IA USPTO Classifications: 33/411, 33/646 Tool Categories: layout tools : scribes : clapboard markers layout tools : squares Assignees: Frederic Castle - Montana, IA Louis Burgess - Montana, IA Manufacturer: Not known to have been produced Witnesses: W. W. Holmes John G. Whitmarsh Myron H. Church Frank Donelly	Patent Dates: Granted: Jul. 11, 1871 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Ralph Brendler
Description: Frederic Castle here improves his original design (112,780 - 3/21/1871) by adding a stabilizer to prevent it from rocking in use.

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