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US Patent: 2,972,487
Indexing Mechanism
Patentee: Donald Macpherson Blackburn (exact or similar names) - Johnstone, Renfrewshire County, Scotland USPTO Classifications: 279/5, 74/817, 74/822 Tool Categories: metalworking machines : indexers and dividers Assignees: John Lang & Sons, Ltd. - Johnstone, Renfrewshire County, Scotland Manufacturer: Not known to have been produced Witnesses: Unknown	Patent Dates: Applied: Apr. 24, 1959 Granted: Feb. 21, 1961 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Joel Havens "Vintage Machinery" entry for John Lang & Sons

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