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US Patent: 420,284
Universal Joint Coupling
Patentee: Frederic Schoff (exact or similar names) - Philadelphia, PA USPTO Classifications: 464/136 Tool Categories: industrial machines : industrial machine mechanisms : industrial machine universal joints Assignees: None Manufacturer: Not known to have been produced Witnesses: William D. Conner Harry Smith A. W. Groupe Hamilton D. Turner	Patent Dates: Applied: Jul. 27, 1889 Granted: Jan. 28, 1890 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Joel Havens "Vintage Machinery" entry for Stow Flexible Shaft Co., Ltd.

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