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US Patent: D156,319
Impact Wrench Unit
Patentee:
Aileen Bushnell (exact or similar names) - Aurora, IL

USPTO Classifications:
D8/68

Tool Categories:

Assignees:
Independent Pneumatic Tool Co. - Aurora, IL

Manufacturer:
Not known to have been produced

Witnesses:
none listed

Patent Dates:
Applied: Sep. 02, 1948
Granted: Dec. 06, 1949

Patent Pictures:
Aileen Bushnell design patent December 6, 1949
USPTO (New site tip)
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Description:
Pneumatic powered impact wrench design.

The specifications cite patent nos. D138,147 and D149,815 as relevant prior art.

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