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US Patent: 402,538
Tool-driver
Patentee: Christopher H. Olson (exact or similar names) - Decatur, IL USPTO Classifications: 74/124 Tool Categories: screwdrivers : screwdriver mechanisms : spiral screwdrivers Assignees: Decatur Coffin Co. - Decatur, IL Manufacturer: Decatur Coffin Co. - Decatur, IL Witnesses: R. E. McDaniel J. C. Hostetler	Patent Dates: Applied: Jun. 08, 1888 Granted: Apr. 30, 1889 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Steve Gosselin
Description: Information taken from Clifford D. Fales' database. One of four spiral screwdriver patents by same patentee as the commonly observed DECATUR COFFIN CO. screwdriver; see patent 306,096.

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