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US Patent: 726,287
Calipers
Patentee: Frank A. Hatch (exact or similar names) - Hanson, MA USPTO Classifications: 33/558.1 Tool Categories: layout tools : calipers Assignees: Walter E. Trufant - Whitman, MA Manufacturer: Walter E. Trufant - Whitman, MA Witnesses: Albert H. Brigham G. Howard Soule Edward F. Allen Thomas J. Drummond	Patent Dates: Applied: Mar. 28, 1902 Granted: Apr. 28, 1903 Patent Pictures: [ 1 | 2 ] USPTO (New site tip) Google Patents Report data errors or omissions to steward Ralph Brendler
Description: This set of calipers features a direct-reading scale that can be rotated out of the way for measuring. Known examples are marked with the patent date and manufacturer information.

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