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US Patent: 825,648
Calipers Violin-Makers' Calipers
Patentee: Jehu Frederick Haworth (exact or similar names) - Shields, PA USPTO Classifications: 33/542 Tool Categories: layout tools : calipers Assignees: None Manufacturer: Not known to have been produced Witnesses: Robt. D. Totten Robert C. Totten J. R. Keller	Patent Dates: Applied: Jun. 28, 1905 Granted: Jul. 10, 1906 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Ralph Brendler
Description: These calipers are designed for measuring the thickness of the top plate of a violin at any point on the head.

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