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US Patent: 346,603
Screw Driver Multi-Blade Screw Driver
Patentees: William F. Patterson (exact or similar names) - Boston, MA Henry B. Stillman (exact or similar names) - New York, NY USPTO Classifications: 7/165, 7/167, 81/438 Tool Categories: screwdrivers : screwdriver blades Assignees: None Manufacturer: Unknown Witnesses: C. F. Brown H. Brown	Patent Dates: Applied: Oct. 23, 1885 Granted: Aug. 03, 1886 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Steve Gosselin

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