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US Patent: 288,624
Spirit Level and Plumb
Patentee: Leonard L. Davis (exact or similar names) - Springfield, MA USPTO Classifications: 33/383, 33/386 Tool Categories: layout tools : levels : metallic levels Assignees: None Manufacturer: Not known to have been produced Witnesses: T. A. Curtis E. E. Holton	Patent Dates: Applied: Jul. 30, 1883 Granted: Nov. 20, 1883 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Russ Allen. Vintage Machinery entry for Leonard L. Davis

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