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US Patent: 922,580
Rule
Patentee: Charles Hansen (exact or similar names) - Corvallis, OR USPTO Classifications: 33/458, 33/832 Tool Categories: rules : folding rules Assignees: None Manufacturer: Not known to have been produced Witnesses: E. D. Horgan T. H. Bengen	Patent Dates: Applied: Oct. 20, 1908 Granted: May 25, 1909 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Russ Allen.
Description: Rule with a grooved slot and pivoting gage block that can move within the slot to allow precise measurement from the end of a board.

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