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US Patent: 1,548,421
Marker Clapboard and Trim Marker
Patentee: Charles B. McCallum (exact or similar names) - Oakland, CA USPTO Classifications: 33/411 Tool Categories: layout tools : scribes : clapboard markers Assignees: None Manufacturer: Not known to have been produced Witnesses: Unknown	Patent Dates: Applied: Apr. 03, 1923 Granted: Aug. 04, 1925 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Ralph Brendler
Description: This is a very simple clapboard marker made of sheet metal, suitable for marking casement trim and baseboards.

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