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US Patent: 1,561,630
Micrometer Calipers
Patentee: Robert A. Wilson (exact or similar names) - Waltham, MA USPTO Classifications: 33/501.4 Tool Categories: metalworking tools : machinist tools : measuring tools : micrometers Assignees: None Manufacturer: Not known to have been produced Witnesses: none listed	Patent Dates: Applied: Nov. 24, 1924 Granted: Nov. 17, 1925 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Joel Havens
Description: Heard, Smith & Tennant - patent attorneys

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