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US Patent: 422,520
Screw-driver
Patentee: Oliver Z. Greene (exact or similar names) - Decatur, IL USPTO Classifications: 74/127 Tool Categories: screwdrivers : screwdriver mechanisms : spiral screwdrivers Assignees: None Manufacturer: Decatur Coffin Co. - Decatur, IL Witnesses: I. D. Walker L. P. Graham	Patent Dates: Applied: Jan. 23, 1889 Granted: Mar. 04, 1890 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. This is the only DECATUR COFFIN CO. model that has a removable bit. Marked, "EUREKA IMPROVED / PAT. MAR. 4—1890 / DECATUR COFFIN CO. / DECATUR, IL."

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