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US Patent: 552,873
Testing Machine
Patentees: William Sellers (exact or similar names) - Philadelphia, PA John Sellers Bancroft (exact or similar names) - Philadelphia, PA Carl G. Barth (exact or similar names) - Philadelphia, PA USPTO Classifications: 73/796, 73/860 Tool Categories: specialty machines : testing machines Assignees: William Sellers & Co., Inc. - Philadelphia, PA Manufacturer: Not known to have been produced Witnesses: Unknown	Patent Dates: Applied: Mar. 25, 1893 Granted: Jan. 07, 1896 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Joel Havens "Vintage Machinery" entry for William Sellers & Co.

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