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US Patent: 1,540,991
Gauge Marking Gauge for Sash Locks
Patentee: Frank Holmgren (exact or similar names) - Minneapolis, MN USPTO Classifications: 33/194 Tool Categories: layout tools : special purpose gauges Assignees: None Manufacturer: Not known to have been produced Witnesses: Unknown	Patent Dates: Applied: Sep. 24, 1923 Granted: Jun. 09, 1925 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Ralph Brendler
Description: This is a specialized marking tool design to accurately place sash locks for double-hung windows.

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