US Patent: 306,394 - Screw holding screwdriver


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US Patent: 306,394

Screw Driver
Screw holding screwdriver

Patentee:

George W. Hael (exact or similar names) - Minneapolis, MN

USPTO Classifications:

81/454

Tool Categories:

screwdrivers : screwdriver blades

specialty tools : screw starters

Assignees:

None

Manufacturer:

Unknown

Witnesses:

P. H. Gunckle

Charles Whechsler

Patent Dates:
Applied:	Aug. 23, 1884
Granted:	Oct. 14, 1884

Patent Pictures:

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Description:

This Patent is for a screw holding spring as well as removeable screw driver blade so it could be replaced or sharpened. This is an improvement of Hael's earlier Patent 303003