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US Patent: 45,535
Improvement in Angle-Protractors Parallel Rule with Protractor
Patentee: Henry Taylor (exact or similar names) - Fortress Monroe, VA USPTO Classifications: 33/431 Tool Categories: rules layout tools : protractors Assignees: None Manufacturer: Not known to have been produced Witnesses: Wm. F. McNamara M. M. Livingston J. P. Hall	Patent Dates: Granted: Dec. 20, 1864 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Ralph Brendler
Description: This is a typical parallel ruler as used for shipboard navigation, with the added convenience of a built-in protractor for laying off vectors.

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