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US Patent: 1,290,921
Micrometer Caliper
Patentee: Joseph Allan Davidson (exact or similar names) - Indianapolis, IN USPTO Classifications: 33/815, 33/821 Tool Categories: layout tools : special purpose gauges metalworking tools : machinist tools : measuring tools : micrometers Assignees: None Manufacturer: Not known to have been produced Witnesses: H. Woodard Myron G. Clear	Patent Dates: Applied: Apr. 30, 1918 Granted: Jan. 14, 1919 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Joel Havens
Description: Munn & Co.- patent attorneys

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