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US Patent: 787,940
Spirit level attachment for straight edges
Patentee: Albert J. Perks (exact or similar names) - Springfield, OH USPTO Classifications: 248/908, 33/370, 33/384 Tool Categories: Assignees: Webster & Perks Tool Co. - Springfield, OH Manufacturer: Webster & Perks Tool Co. - Springfield, OH Witnesses: Chas. I. Welch Clifton P. Grant	Patent Dates: Applied: Jul. 23, 1904 Granted: Apr. 25, 1905 Patent Pictures: [ 1 | 2 ] USPTO (New site tip) Google Patents Report data errors or omissions to steward Russ Allen "Vintage Machinery" entry for Webster & Perks Tool Co.
Description: One of these appeared in a Martin J. Donnelly auction

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