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US Patent: 998,616
Trammel head
Patentees: Frederick C. Jewell (exact or similar names) - Chicago, IL Henry S. Jewell (exact or similar names) - Chicago, IL USPTO Classifications: 33/27.031 Tool Categories: layout tools : compasses : trammels Assignees: None Manufacturer: Not known to have been produced Witnesses: J. H. Jochum, Jr. C. H. Seem	Patent Dates: Applied: Sep. 30, 1910 Granted: Jul. 25, 1911 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Russ Allen

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