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US Patent: 682,506
Horseshoe
Patentee: Otto Swanstrom (exact or similar names) - Frazee, MN USPTO Classifications: 168/41 Tool Categories: Assignees: None Manufacturer: Giant Grip Mfg, - Oshkosh, WI Witnesses: Ray W. Jones Chas. J. Brown	Patent Dates: Applied: Mar. 11, 1901 Granted: Sep. 10, 1901 Patent Pictures: [ 1 | 2 ] USPTO (New site tip) Google Patents Report data errors or omissions to steward Russ Allen Diamond's history
Description: This was Otto Swanstrom's first patent. This patent, along with his brother-in-law's 1,320,878, was the foundation of the Diamond Calk company.

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