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US Patent: 1,404,545
Apparatus for Determining the Position of Machine Tools
Patentee: Francis A. Richardson (exact or similar names) - San Francisco, San Francisco County, CA USPTO Classifications: 29/407.05, 33/516, 33/628, 33/836, 409/111, 409/94, 82/11.1, 82/152 Tool Categories: metalworking machines : metal lathes : metal lathe accessories and attachments Assignees: None Manufacturer: Not known to have been produced Witnesses: Unknown	Patent Dates: Applied: Apr. 20, 1920 Granted: Jan. 24, 1922 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Joel Havens

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