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US Patent: 855,280
Interchangeable and Adjustable Screw Driver and Combined Tool Holder
Patentee: Victor E. Campbell (exact or similar names) - Portland, Multnomah County, OR USPTO Classifications: 279/50, 294/100, 81/112, 81/43 Tool Categories: industrial tools : tool holders screwdrivers : screwdriver blades trade specific : watchmaker Assignees: None Manufacturer: Not known to have been produced Witnesses: N. Cambell Thomas E. Huhne	Patent Dates: Applied: Nov. 14, 1906 Granted: May 28, 1907 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Steve Gosselin

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